diff --git a/.DS_Store b/.DS_Store
index 3e56771..291cb29 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/index.html b/index.html
index 02603b1..106ce77 100644
--- a/index.html
+++ b/index.html
@@ -88,12 +88,12 @@
     <div style="position: absolute; top:0;right:0;">
         <div id="pause-grid-right" class="pause-grid"></div>
     </div>
-    <svg class="SVG-button" id="experiment-button" width="155" height="40" style="border: 2px #333 solid;">
+    <svg class="SVG-button ui" id="experiment-button" width="155" height="40" style="border: 2px #333 solid;">
         <g stroke='none' fill='#333' stroke-width="2" font-size="28px" font-family="Arial, sans-serif">
             <text x="10" y="30">experiment</text>
         </g>
     </svg>
-    <div id='info'>
+    <div id='info' class="ui">
         <div id="settings">
             <details>
                 <summary>settings</summary>
@@ -334,7 +334,7 @@
             animation: dash 5s ease-in forwards;
         }
     </style>
-    <svg id='splash' class="intro" viewBox="0 0 800 800" onclick="simulation.startGame()">
+    <svg id='splash' class="intro ui" viewBox="0 0 800 800" onclick="simulation.startGame()">
         <!-- title -->
         <!-- <g class="fade-in" transform="translate(100,210) scale(34)" fill='#bbb' stroke='none'>
 			<path d="M0 0  h1  v0.2  h1.7  l0.3 0.3  v2.6  h-1  v-1.7  h-1  v1.7  h-1 z" fill="rgb(50,200,255)" />
diff --git a/js/bullet.js b/js/bullet.js
index 9e596d8..012135e 100644
--- a/js/bullet.js
+++ b/js/bullet.js
@@ -3154,6 +3154,40 @@ const b = {
             if (bullet[i].botType && bullet[i].endCycle === Infinity) bullet[i].endCycle = 0 //remove active bots, but don't remove temp bots
         }
     },
+    removeBot() {
+        if (tech.nailBotCount > 1) {
+            tech.nailBotCount--
+            return
+        }
+        if (tech.laserBotCount > 1) {
+            tech.laserBotCount--
+            return
+        }
+        if (tech.foamBotCount > 1) {
+            tech.foamBotCount--
+            return
+        }
+        if (tech.boomBotCount > 1) {
+            tech.boomBotCount--
+            return
+        }
+        if (tech.orbitBotCount > 1) {
+            tech.orbitBotCount--
+            return
+        }
+        if (tech.dynamoBotCount > 1) {
+            tech.dynamoBotCount--
+            return
+        }
+        if (tech.missileBotCount > 1) {
+            tech.missileBotCount--
+            return
+        }
+        if (tech.plasmaBotCount > 1) {
+            tech.plasmaBotCount--
+            return
+        }
+    },
     zeroBotCount() { //remove all bots
         tech.dynamoBotCount = 0
         tech.laserBotCount = 0
@@ -5156,6 +5190,16 @@ const b = {
                 const length = tech.isLargeHarpoon ? 1 + 0.09 * Math.sqrt(this.ammo) : 1
                 const totalCycles = 7 * (tech.isFilament ? 1 + 0.009 * Math.min(100, this.ammo) : 1) * Math.sqrt(length)
                 if (input.down) {
+                    // if (true) {
+                    //     if (m.immuneCycle < m.cycle + 60) m.immuneCycle = m.cycle + tech.collisionImmuneCycles; //player is immune to damage for 30 cycles
+                    //     b.harpoon(where, closest.target, m.angle, length, false, 15)
+                    //     m.fireCDcycle = m.cycle + 50 * b.fireCDscale; // cool down
+                    //     const speed = 50
+                    //     const velocity = { x: speed * Math.cos(m.angle), y: speed * Math.sin(m.angle) }
+                    //     Matter.Body.setVelocity(player, velocity);
+
+                    // } else {
+
                     for (let i = 0, len = mob.length; i < len; ++i) {
                         if (mob[i].alive && !mob[i].isBadTarget && Matter.Query.ray(map, m.pos, mob[i].position).length === 0) {
                             const dot = Vector.dot(dir, Vector.normalise(Vector.sub(mob[i].position, m.pos))) //the dot product of diff and dir will return how much over lap between the vectors
@@ -5168,6 +5212,7 @@ const b = {
                     }
                     b.harpoon(where, closest.target, m.angle, length, false, 15)
                     m.fireCDcycle = m.cycle + 50 * b.fireCDscale; // cool down
+                    // }
                 } else if (tech.extraHarpoons) {
                     const range = 450 * (tech.isFilament ? 1 + Math.min(100, this.ammo) / 100 : 1)
                     let targetCount = 0
@@ -5405,10 +5450,6 @@ const b = {
                         if ((!input.fire && this.charge > 0.6)) { //fire on mouse release or on low energy
                             m.fireCDcycle = m.cycle + 2; // set fire cool down
                             //normal bullet behavior occurs after firing, overwrites this function
-                            this.do = function() {
-                                this.force.y += this.mass * 0.0003 / this.charge; // low gravity that scales with charge
-                            }
-
                             Matter.Body.scale(this, 8000, 8000) // show the bullet by scaling it up  (don't judge me...  I know this is a bad way to do it)
                             this.endCycle = simulation.cycle + 140
                             this.collisionFilter.category = cat.bullet
@@ -5423,6 +5464,96 @@ const b = {
                                 y: m.Vy / 2 + speed * this.charge * Math.sin(m.angle)
                             });
 
+                            if (tech.isRodAreaDamage) {
+                                this.auraRadius = 800
+                                this.semiMinor = 0.5
+                                this.where = { x: m.pos.x, y: m.pos.y }
+                                this.velocityAura = { x: this.velocity.x, y: this.velocity.y }
+                                this.angleAura = this.angle
+                                this.do = function() {
+                                    this.force.y += this.mass * 0.0003 / this.charge; // low gravity that scales with charge
+                                    this.velocityAura.y += 0.085 / this.charge;
+                                    this.where = Vector.add(this.where, this.velocityAura)
+
+                                    //draw damage aura
+                                    this.semiMinor = this.semiMinor * 0.99
+                                    this.auraRadius = this.auraRadius * 0.99
+                                    let where = Vector.add(Vector.mult(this.velocityAura, -0.5), this.where)
+                                    ctx.beginPath();
+                                    ctx.ellipse(where.x, where.y, this.auraRadius * 0.25, this.auraRadius * 0.15 * this.semiMinor, this.angleAura, 0, 2 * Math.PI)
+                                    ctx.fillStyle = "rgba(255,100,0,0.75)";
+                                    ctx.fill();
+                                    where = Vector.add(Vector.mult(this.velocity, -1), where)
+                                    ctx.beginPath();
+                                    ctx.ellipse(where.x, where.y, this.auraRadius * 0.5, this.auraRadius * 0.5 * this.semiMinor, this.angleAura, 0, 2 * Math.PI)
+                                    ctx.fillStyle = "rgba(255,50,0,0.35)";
+                                    ctx.fill();
+                                    where = Vector.add(Vector.mult(this.velocity, -1), where)
+                                    ctx.beginPath();
+                                    ctx.ellipse(where.x, where.y, this.auraRadius * 0.75, this.auraRadius * 0.7 * this.semiMinor, this.angleAura, 0, 2 * Math.PI)
+                                    ctx.fillStyle = "rgba(255,0,0,0.15)";
+                                    ctx.fill();
+                                    where = Vector.add(Vector.mult(this.velocity, -1), where)
+                                    ctx.beginPath();
+                                    ctx.ellipse(where.x, where.y, this.auraRadius, this.auraRadius * this.semiMinor, this.angleAura, 0, 2 * Math.PI)
+                                    ctx.fillStyle = "rgba(255,0,0,0.03)";
+                                    ctx.fill();
+                                    // this.semiMinor = this.semiMinor * 0.95 + (1 - Math.min(0.5, this.speed * 0.02)) * 0.05
+                                    // this.auraRadius = this.auraRadius * 0.95 + this.speed * 10 * 0.05
+                                    // let where = Vector.add(Vector.mult(this.velocity, -1), this.position)
+                                    // const angle = Math.atan2(this.velocity.y, this.velocity.x)
+                                    // ctx.beginPath();
+                                    // ctx.ellipse(where.x, where.y, this.auraRadius * 0.25, this.auraRadius * 0.15 * this.semiMinor, angle, 0, 2 * Math.PI)
+                                    // ctx.fillStyle = "rgba(255,100,0,0.75)";
+                                    // ctx.fill();
+                                    // where = Vector.add(Vector.mult(this.velocity, -2), where)
+                                    // ctx.beginPath();
+                                    // ctx.ellipse(where.x, where.y, this.auraRadius * 0.5, this.auraRadius * 0.5 * this.semiMinor, angle, 0, 2 * Math.PI)
+                                    // ctx.fillStyle = "rgba(255,50,0,0.35)";
+                                    // ctx.fill();
+                                    // where = Vector.add(Vector.mult(this.velocity, -2), where)
+                                    // ctx.beginPath();
+                                    // ctx.ellipse(where.x, where.y, this.auraRadius * 0.75, this.auraRadius * 0.7 * this.semiMinor, angle, 0, 2 * Math.PI)
+                                    // ctx.fillStyle = "rgba(255,0,0,0.15)";
+                                    // ctx.fill();
+                                    // where = Vector.add(Vector.mult(this.velocity, -2), where)
+                                    // ctx.beginPath();
+                                    // ctx.ellipse(where.x, where.y, this.auraRadius, this.auraRadius * this.semiMinor, angle, 0, 2 * Math.PI)
+                                    // ctx.fillStyle = "rgba(255,0,0,0.03)";
+                                    // ctx.fill();
+                                    //damage mobs in a circle based on this.semiMinor radius
+                                    if (this.auraRadius > 200) {
+                                        for (let i = 0, len = mob.length; i < len; ++i) {
+                                            const dist = Vector.magnitude(Vector.sub(mob[i].position, where))
+                                            if (dist < mob[i].radius + this.auraRadius) {
+                                                //push mob in direction of bullet
+                                                const mag = 0.0001
+                                                mob[i].force.x += mag * this.velocity.x;
+                                                mob[i].force.y += mag * this.velocity.y;
+                                                //damage mob
+                                                const damage = b.dmgScale * 0.002 * dist
+                                                mob[i].damage(damage);
+                                                mob[i].locatePlayer();
+                                                simulation.drawList.push({ //add dmg to draw queue
+                                                    x: mob[i].position.x,
+                                                    y: mob[i].position.y,
+                                                    radius: Math.log(2 * damage + 1.1) * 40,
+                                                    color: "rgba(255,0,0,0.25)",
+                                                    time: simulation.drawTime
+                                                });
+                                            }
+                                        }
+                                    }
+                                    //push blocks power ups and mobs to the direction the rod is moving
+
+                                }
+                            } else {
+                                this.do = function() {
+                                    this.force.y += this.mass * 0.0003 / this.charge; // low gravity that scales with charge
+                                }
+                            }
+
+
                             //knock back
                             const KNOCK = ((input.down) ? 0.1 : 0.5) * this.charge * this.charge * (tech.isShotgunReversed ? -2 : 1)
                             player.force.x -= KNOCK * Math.cos(m.angle)
diff --git a/js/engine.js b/js/engine.js
index 1a1d97e..5d5819c 100644
--- a/js/engine.js
+++ b/js/engine.js
@@ -103,7 +103,6 @@ function collisionChecks(event) {
                     if (
                         m.immuneCycle < m.cycle &&
                         (obj === playerBody || obj === playerHead) &&
-                        // (obj === player) &&
                         !(tech.isFreezeHarmImmune && (mob[k].isSlowed || mob[k].isStunned))
                     ) {
                         let dmg = Math.min(Math.max(0.025 * Math.sqrt(mob[k].mass), 0.05), 0.3) * simulation.dmgScale; //player damage is capped at 0.3*dmgScale of 1.0
diff --git a/js/index.js b/js/index.js
index 4b81409..484bc54 100644
--- a/js/index.js
+++ b/js/index.js
@@ -155,13 +155,9 @@ function setupCanvas() {
     canvas.height = window.innerHeight;
     canvas.width2 = canvas.width / 2; //precalculated because I use this often (in mouse look)
     canvas.height2 = canvas.height / 2;
-    // canvas.diagonal = Math.sqrt(canvas.width2 * canvas.width2 + canvas.height2 * canvas.height2);
-    // ctx.font = "18px Arial";
-    // ctx.textAlign = "center";
     ctx.font = "25px Arial";
     ctx.lineJoin = "round";
     ctx.lineCap = "round";
-    // ctx.lineCap='square';
     simulation.setZoom();
 }
 setupCanvas();
diff --git a/js/level.js b/js/level.js
index 726ff3a..f24c511 100644
--- a/js/level.js
+++ b/js/level.js
@@ -15,11 +15,10 @@ const level = {
             // localSettings.levelsClearedLastGame = 10
             // level.difficultyIncrease(30) //30 is near max on hard  //60 is near max on why
             // simulation.isHorizontalFlipped = true
-            // b.giveGuns("laser")
             // m.setField("plasma torch")
-            // tech.giveTech("extruder")
+            // b.giveGuns("railgun")
+            // tech.giveTech("aerodynamic heating")
             // for (let i = 0; i < 2; i++) tech.giveTech("refractory metal")
-            // tech.giveTech("mouth")
             // tech.giveTech("all-stars")
             // for (let i = 0; i < 3; i++) tech.giveTech("overcharge")
             // for (let i = 0; i < 2; i++) tech.giveTech("laser-bot")
@@ -78,6 +77,20 @@ const level = {
         simulation.draw.setPaths();
         b.respawnBots();
         m.resetHistory();
+
+        if (tech.isForeverDrones) {
+            if (tech.isDroneRadioactive) {
+                for (let i = 0; i < tech.isForeverDrones * 0.25; i++) {
+                    b.droneRadioactive({ x: m.pos.x + 30 * (Math.random() - 0.5), y: m.pos.y + 30 * (Math.random() - 0.5) }, 5)
+                    bullet[bullet.length - 1].endCycle = Infinity
+                }
+            } else {
+                for (let i = 0; i < tech.isForeverDrones; i++) {
+                    b.drone({ x: m.pos.x + 30 * (Math.random() - 0.5), y: m.pos.y + 30 * (Math.random() - 0.5) }, 5)
+                    bullet[bullet.length - 1].endCycle = Infinity
+                }
+            }
+        }
         if (tech.isExtraMaxEnergy) {
             tech.healMaxEnergyBonus += 0.03 * powerUps.totalPowerUps //Math.min(0.02 * powerUps.totalPowerUps, 0.51)
             m.setMaxEnergy();
@@ -2294,9 +2307,9 @@ const level = {
         spawn.mapRect(5300, -275, 50, 175);
         spawn.mapRect(5050, -100, 50, 150);
         spawn.mapRect(4850, -275, 50, 175);
-        level.difficultyIncrease(30) //30 is near max on hard  //60 is near max on why
-        spawn.starter(1900, -500, 200) //big boy
-        // spawn.blockGroup(1900, -500)
+        // level.difficultyIncrease(30) //30 is near max on hard  //60 is near max on why
+        // spawn.starter(1900, -500, 200) //big boy
+        spawn.blockGroup(1900, -500)
         // for (let i = 0; i < 10; ++i) spawn.bodyRect(1600 + 5, -500, 30, 40);
         // spawn.laserBombingBoss(1900, -500)
         // for (let i = 0; i < 5; i++) spawn.focuser(1900, -500)
diff --git a/js/player.js b/js/player.js
index e73337a..0b9b9dc 100644
--- a/js/player.js
+++ b/js/player.js
@@ -438,7 +438,7 @@ const m = {
             m.health = 0;
             m.displayHealth();
             document.getElementById("text-log").style.opacity = 0; //fade out any active text logs
-            document.getElementById("fade-out").style.opacity = 0.8; //1; //slowly fade to white
+            document.getElementById("fade-out").style.opacity = 0.9; //slowly fade to 90% white on top of canvas
             // build.shareURL(false)
             setTimeout(function() {
                 Composite.clear(engine.world);
diff --git a/js/simulation.js b/js/simulation.js
index 58bc119..4bbbc32 100644
--- a/js/simulation.js
+++ b/js/simulation.js
@@ -524,14 +524,22 @@ const simulation = {
         document.getElementById("choose-grid").style.visibility = "hidden"
         document.getElementById("choose-grid").style.opacity = "0"
         document.getElementById("info").style.display = "inline";
+        document.getElementById("info").style.opacity = "0";
         document.getElementById("experiment-button").style.display = "inline"
+        document.getElementById("experiment-button").style.opacity = "0";
         document.getElementById("experiment-grid").style.display = "none"
         document.getElementById("pause-grid-left").style.display = "none"
         document.getElementById("pause-grid-right").style.display = "none"
         document.getElementById("splash").style.display = "inline";
+        document.getElementById("splash").style.opacity = "0";
         document.getElementById("dmg").style.display = "none";
         document.getElementById("health-bg").style.display = "none";
         document.body.style.cursor = "auto";
+        setTimeout(() => {
+            document.getElementById("experiment-button").style.opacity = "1";
+            document.getElementById("info").style.opacity = "1";
+            document.getElementById("splash").style.opacity = "1";
+        }, 200);
     },
     fpsInterval: 0, //set in startGame
     then: null,
@@ -590,6 +598,7 @@ const simulation = {
         document.getElementById("experiment-grid").style.display = "none"
         document.getElementById("info").style.display = "none";
         document.getElementById("experiment-button").style.display = "none";
+        // document.getElementById("experiment-button").style.opacity = "0";
         document.getElementById("splash").onclick = null; //removes the onclick effect so the function only runs once
         document.getElementById("splash").style.display = "none"; //hides the element that spawned the function
         document.getElementById("dmg").style.display = "inline";
diff --git a/js/spawn.js b/js/spawn.js
index 68487c4..cc91bfd 100644
--- a/js/spawn.js
+++ b/js/spawn.js
@@ -670,7 +670,7 @@ const spawn = {
         let me = mob[mob.length - 1];
         // console.log(`mass=${me.mass}, radius = ${radius}`)
         me.accelMag = 0.0002
-        me.repulsionRange = 100000 + radius * radius; //squared
+        me.repulsionRange = 200000 + radius * radius; //squared
         // me.memory = 120;
         me.seeAtDistance2 = 2000000 //1400 vision range
         Matter.Body.setDensity(me, 0.0005) // normal density is 0.001 // this reduces life by half and decreases knockback
diff --git a/js/tech.js b/js/tech.js
index d47cf1e..5810af3 100644
--- a/js/tech.js
+++ b/js/tech.js
@@ -934,7 +934,7 @@
                 frequency: 1,
                 frequencyDefault: 1,
                 allowed() {
-                    return ((m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isDroneTeleport || tech.isDroneRadioactive || tech.isSporeField || tech.isMissileField || tech.isIceField)) || (tech.haveGunCheck("drones") && !tech.isDroneRadioactive && !tech.isDroneTeleport) || tech.haveGunCheck("super balls") || tech.haveGunCheck("shotgun")) && !tech.isNailShot && !tech.isIceShot && !tech.isFoamShot && !tech.isWormShot && !tech.isNeedleShot
+                    return ((m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isDroneTeleport || tech.isDroneRadioactive || tech.isSporeField || tech.isMissileField || tech.isIceField)) || (tech.haveGunCheck("drones") && !tech.isForeverDrones && !tech.isDroneRadioactive && !tech.isDroneTeleport) || tech.haveGunCheck("super balls") || tech.haveGunCheck("shotgun")) && !tech.isNailShot && !tech.isIceShot && !tech.isFoamShot && !tech.isWormShot && !tech.isNeedleShot
                 },
                 requires: "super balls, basic or slug shotgun, drones, not irradiated drones or burst drones",
                 effect() {
@@ -1504,7 +1504,7 @@
             },
             {
                 name: "robotics",
-                description: `spawn a random <strong>bot</strong><br><strong>quadruple</strong> the <strong class='flicker'>frequency</strong> of finding <strong>bot</strong> <strong class='color-m'>tech</strong>`,
+                description: `spawn <strong>2</strong> random <strong>bots</strong><br><strong>quadruple</strong> the <strong class='flicker'>frequency</strong> of finding <strong>bot</strong> <strong class='color-m'>tech</strong>`,
                 maxCount: 1,
                 count: 0,
                 frequency: 1,
@@ -1515,6 +1515,7 @@
                 },
                 requires: "at least 2 bots",
                 effect: () => {
+                    b.randomBot()
                     b.randomBot()
                     for (let i = 0, len = tech.tech.length; i < len; i++) {
                         if (tech.tech[i].isBotTech) tech.tech[i].frequency *= 4
@@ -1522,8 +1523,12 @@
                 },
                 remove() {
                     if (this.count > 0) {
+                        b.removeBot()
+                        b.removeBot()
+                        b.clearPermanentBots();
+                        b.respawnBots();
                         for (let i = 0, len = tech.tech.length; i < len; i++) {
-                            if (tech.tech[i].isBotTech) tech.tech[i].frequency /= 4
+                            if (tech.tech[i].isBotTech) tech.tech[i].frequency = Math.ceil(tech.tech[i].frequency / 4)
                         }
                     }
                 }
@@ -4384,7 +4389,7 @@
             {
                 name: "missile-bot",
                 link: `<a target="_blank" href='https://en.wikipedia.org/wiki/Robot' class="link">missile-bot</a>`,
-                description: "remove your <strong>missile gun</strong><br>gain a <strong class='color-bot'>bot</strong> that fires <strong>missiles</strong> at mobs",
+                description: "gain a <strong class='color-bot'>bot</strong> that fires <strong>missiles</strong> at mobs<br>remove your <strong>missile gun</strong>",
                 isGunTech: true,
                 maxCount: 1,
                 count: 0,
@@ -4747,10 +4752,44 @@
                     tech.wormSurviveDmg = false
                 }
             },
+            {
+                name: "fault tolerance",
+                description: "spawn <strong>9</strong> <strong>drones</strong> that last <strong>forever</strong><br>remove your <strong>drone gun</strong>",
+                isGunTech: true,
+                maxCount: 3,
+                count: 0,
+                frequency: 2,
+                frequencyDefault: 2,
+                allowed() {
+                    return tech.haveGunCheck("drones") || tech.isForeverDrones
+                },
+                requires: "drone gun",
+                effect() {
+                    const num = 9
+                    tech.isForeverDrones += num
+                    if (tech.haveGunCheck("drones")) b.removeGun("drones")
+                    //spawn drones
+                    if (tech.isDroneRadioactive) {
+                        for (let i = 0; i < num * 0.25; i++) {
+                            b.droneRadioactive({ x: m.pos.x + 30 * (Math.random() - 0.5), y: m.pos.y + 30 * (Math.random() - 0.5) }, 5)
+                            bullet[bullet.length - 1].endCycle = Infinity
+                        }
+                    } else {
+                        for (let i = 0; i < num; i++) {
+                            b.drone({ x: m.pos.x + 30 * (Math.random() - 0.5), y: m.pos.y + 30 * (Math.random() - 0.5) }, 5)
+                            bullet[bullet.length - 1].endCycle = Infinity
+                        }
+                    }
+                },
+                remove() {
+                    tech.isForeverDrones = 0
+                    if (this.count && !tech.haveGunCheck("drones")) b.giveGuns("drones")
+                }
+            },
             {
                 name: "reduced tolerances",
                 link: `<a target="_blank" href='https://en.wikipedia.org/wiki/Engineering_tolerance' class="link">reduced tolerances</a>`,
-                description: `increase <strong>drones</strong> per ${powerUps.orb.ammo()} or <strong class='color-f'>energy</strong> <strong>66%</strong><br>reduce the average <strong>drone</strong> lifetime by <strong>40%</strong>`,
+                description: `increase <strong>drones</strong> per ${powerUps.orb.ammo()} or <strong class='color-f'>energy</strong> by <strong>66%</strong><br>reduce the average <strong>drone</strong> lifetime by <strong>40%</strong>`,
                 isGunTech: true,
                 maxCount: 3,
                 count: 0,
@@ -4787,7 +4826,7 @@
                 frequency: 2,
                 frequencyDefault: 2,
                 allowed() {
-                    return !tech.isExtraMaxEnergy && (tech.haveGunCheck("drones") || (m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isSporeField || tech.isMissileField || tech.isIceField)))
+                    return !tech.isExtraMaxEnergy && (tech.haveGunCheck("drones") || tech.isForeverDrones || (m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isSporeField || tech.isMissileField || tech.isIceField)))
                 },
                 requires: "drones, not inductive coupling",
                 effect() {
@@ -4800,7 +4839,7 @@
             {
                 name: "drone repair",
                 link: `<a target="_blank" href='https://en.wikipedia.org/wiki/Unmanned_aerial_vehicle' class="link">drone repair</a>`,
-                description: "after a <strong>drone</strong> ends it <strong>redeploys</strong><br>for a <strong>25%</strong> chance to use <strong>1</strong> <strong>drone</strong> <strong class='color-ammo'>ammo</strong>",
+                description: "after a <strong>drone</strong> expires it <strong>redeploys</strong><br>for a <strong>25%</strong> chance to use <strong>1</strong> <strong>drone</strong> <strong class='color-ammo'>ammo</strong>",
                 // description: "broken <strong>drones</strong> <strong>repair</strong> if the drone <strong class='color-g'>gun</strong> is active<br><strong>repairing</strong> has a <strong>25%</strong> chance to use <strong>1</strong> <strong>drone</strong>",
                 isGunTech: true,
                 maxCount: 1,
@@ -4819,8 +4858,7 @@
                 }
             },
             {
-                name: "torque bursts",
-                link: `<a target="_blank" href='https://en.wikipedia.org/wiki/Electric_motor#Torque_motor' class="link">torque bursts</a>`,
+                name: "brushless motor",
                 description: "<strong>drones</strong> rapidly <strong>rush</strong> towards their target<br>increase <strong>drone</strong> collision <strong class='color-d'>damage</strong> by <strong>33%</strong>",
                 isGunTech: true,
                 maxCount: 1,
@@ -4828,7 +4866,7 @@
                 frequency: 3,
                 frequencyDefault: 3,
                 allowed() {
-                    return tech.haveGunCheck("drones") && !tech.isDroneRadioactive && !tech.isIncendiary
+                    return (tech.haveGunCheck("drones") || tech.isForeverDrones) && !tech.isDroneRadioactive && !tech.isIncendiary
                 },
                 requires: "drone gun, not irradiated drones, incendiary",
                 effect() {
@@ -4839,7 +4877,7 @@
                 }
             },
             {
-                name: "brushless motor",
+                name: "axial flux motor",
                 description: "<strong>drones</strong> can <strong>rush</strong> <strong>66%</strong> more often<br>increase <strong>drone</strong> collision <strong class='color-d'>damage</strong> by <strong>44%</strong>",
                 isGunTech: true,
                 maxCount: 1,
@@ -4867,7 +4905,7 @@
                 frequency: 2,
                 frequencyDefault: 2,
                 allowed() {
-                    return tech.droneCycleReduction === 1 && !tech.isIncendiary && !tech.isDroneTeleport && (tech.haveGunCheck("drones") || (m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isSporeField || tech.isMissileField || tech.isIceField)))
+                    return tech.droneCycleReduction === 1 && !tech.isIncendiary && !tech.isDroneTeleport && (tech.haveGunCheck("drones") || tech.isForeverDrones || (m.fieldUpgrades[m.fieldMode].name === "molecular assembler" && !(tech.isSporeField || tech.isMissileField || tech.isIceField)))
                 },
                 requires: "drones, not reduced tolerances, incendiary, torque bursts",
                 effect() {
@@ -5183,6 +5221,25 @@
                     tech.isRailAreaDamage = false;
                 }
             },
+            {
+                name: "aerodynamic heating",
+                description: "<strong>railgun</strong> rod <strong class='color-d'>damage</strong> nearby mobs",
+                isGunTech: true,
+                maxCount: 1,
+                count: 0,
+                frequency: 2,
+                frequencyDefault: 2,
+                allowed() {
+                    return tech.haveGunCheck("railgun")
+                },
+                requires: "railgun",
+                effect() {
+                    tech.isRodAreaDamage = true;
+                },
+                remove() {
+                    tech.isRodAreaDamage = false;
+                }
+            },
             {
                 name: "capacitor bank",
                 description: "the <strong>railgun</strong> no longer takes time to <strong>charge</strong><br><strong>railgun</strong> rods are <strong>66%</strong> less massive",
@@ -5971,9 +6028,9 @@
                 isBot: true,
                 isBotTech: true,
                 allowed() {
-                    return !tech.isExtruder && m.fieldUpgrades[m.fieldMode].name === "plasma torch" && (build.isExperimentSelection || powerUps.research.count > 0)
+                    return m.fieldUpgrades[m.fieldMode].name === "plasma torch" && (build.isExperimentSelection || powerUps.research.count > 0)
                 },
-                requires: "plasma torch, not extruder",
+                requires: "plasma torch",
                 effect() {
                     tech.plasmaBotCount++;
                     b.plasmaBot();
@@ -6030,9 +6087,9 @@
                 frequency: 2,
                 frequencyDefault: 2,
                 allowed() {
-                    return m.fieldUpgrades[m.fieldMode].name === "plasma torch" && tech.plasmaBotCount === 0
+                    return m.fieldUpgrades[m.fieldMode].name === "plasma torch"
                 },
-                requires: "plasma torch, not  plasma-bot",
+                requires: "plasma torch",
                 effect() {
                     tech.isExtruder = true;
                     m.fieldUpgrades[m.fieldMode].set()
@@ -8486,5 +8543,7 @@
         removeMaxHealthOnKill: null,
         isSpawnExitTech: null,
         cloakDuplication: null,
-        extruderRange: null
+        extruderRange: null,
+        isRodAreaDamage: null,
+        isForeverDrones: null
     }
\ No newline at end of file
diff --git a/style.css b/style.css
index 70345a8..d1b4ed8 100644
--- a/style.css
+++ b/style.css
@@ -54,6 +54,7 @@ em {
     width: 100%;
     height: 100%;
     z-index: 2;
+    transition: opacity 5s ease-in;
 }
 
 *:focus {
@@ -121,6 +122,7 @@ summary {
     bottom: 3px;
     right: 3px;
     z-index: 12;
+    transition: opacity 5s ease-in;
 }
 
 #construct {
@@ -360,6 +362,7 @@ summary {
     left: 3px;
     z-index: 12;
     font-size: 1.5em;
+    transition: opacity 5s ease-in;
 }
 
 .details-div {
diff --git a/todo.txt b/todo.txt
index e2fc8fd..a689122 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,22 +1,26 @@
 ******************************************************** NEXT PATCH **************************************************
 
-after you die your canvas sticks around at 10% opacity
-add a mouse over underline effect to hint that names are links
-molecular assembler: all 3 manufacturing tech cost 3 -> 1 research
+tech: fault tolerance - spawn 9 drones that last forever, remove your drone gun
+
+fade in after death is more gradual
 
 ******************************************************** TODO ********************************************************
 
-death animation ideas:
-  redraw game in strange ways, to show that it's a simulation (for example the testing mode is a strange redraw of map)
-    stroke only, but connect all vertices together,  no moveTo
-    draw dots at all the vertices
+tech rocket jump - jumping produces an explosion at your feet that lets you jump extra high, but does some damage
 
-buff railgun
-  relativistic jets:    fire something out the front and back
-    alternate name: gamma-ray burst
-    small particles that shot out from front and back poles and end up in a wide variety of spirals
-      slow trickle when charging and several more when firing
+harpoon tech: dash -   press down and fire to go immune to harm for 1 second and dash forward with your harpoon acting like a lance
+  after you fire harpoon replace it's this.do()  with just being in front of player
+
+harpoon grappling hook - basic effect is working, but needs work before it becomes fun
+
+tech: aerodynamic heating - railgun rods super heat the air around it doing AoE damage
+
+tech: relativistic jets:
+  small particles that shot out from front and back poles and end up in a wide variety of spirals
+    slow trickle when charging and several more when firing
   
+Tech: Make player smol
+
 
 adapt the cloaking graphics to make a flashlight cone visual effect
   put code in level.do?
@@ -26,30 +30,8 @@ be nice if block throwing had a projected path
 JUNK tech: planetesimals game inside n-gon
 https://codepen.io/lilgreenland/pen/jrMvaB?editors=0010
 
-Tech: Make player smol
-
 disable zoom progress when paused
 
-harpoon
-  post launch tracking: more airFriction, more thrust, harder turning
-    if no target found slow down and aim much better?
-harpoon tech
-  crouch fire grapple hook
-    attaches to map at long range and pulls player?
-  tech that buffs alt fire:
-    remove the string, all shots are alt fire
-    alt fire has a 50% chance to not use ammo?
-  holding down fire lets the string extend farther,
-    this can overwrite crouch mode
-    can't have 2+ harpoons
-    it uses up ammo as extends, and returns it as it contracts?
-      will this effect performance?
-  2+ harpoons, with separate CDs
-    can't have extended string?
-  grappling hook?
-  tracking so good harpoon can hit a target, circle around and hit it again
-    doesn't seem to be good physics, the harpoon hits walls and doesn't get room to build up speed
-
 "Interstellar Disturbance": Cosmic String applies to mobs who cross the wormhole's path, even after initial wormholing, but at reduced damage and stun time.
 
 on mouse down wormhole shows a possible wormhole
@@ -453,6 +435,7 @@ possible names for tech
   nonlocal
   fine-tuned universe
   eternalism https://en.wikipedia.org/wiki/Eternalism_(philosophy_of_time)
+  axial motor
  
 a tutorial / lore intro
   needs to be optional so it doesn't slow experienced players