diff --git a/core/src/mindustry/content/TechTree.java b/core/src/mindustry/content/TechTree.java
index 59d7ac389a..d10ff747de 100644
--- a/core/src/mindustry/content/TechTree.java
+++ b/core/src/mindustry/content/TechTree.java
@@ -328,21 +328,29 @@ public class TechTree implements ContentList{
         });
     }
 
-    private static TechNode node(Block block, Runnable children){
-        ItemStack[] requirements = new ItemStack[block.requirements.length];
-        for(int i = 0; i < requirements.length; i++){
-            requirements[i] = new ItemStack(block.requirements[i].item, 40 + Mathf.round(Mathf.pow(block.requirements[i].amount, 1.25f) * 6, 10));
+    private static TechNode node(UnlockableContent content, Runnable children){
+        ItemStack[] requirements;
+
+        if(content instanceof Block){
+            Block block = (Block)content;
+
+            requirements = new ItemStack[block.requirements.length];
+            for(int i = 0; i < requirements.length; i++){
+                requirements[i] = new ItemStack(block.requirements[i].item, 40 + Mathf.round(Mathf.pow(block.requirements[i].amount, 1.25f) * 6, 10));
+            }
+        }else{
+            requirements = ItemStack.empty;
         }
 
-        return new TechNode(block, requirements, children);
+        return new TechNode(content, requirements, children);
     }
 
     private static TechNode node(Block block){
         return node(block, () -> {});
     }
 
-    public static TechNode create(Block parent, Block block){
-        TechNode.context = all.find(t -> t.block == parent);
+    public static TechNode create(UnlockableContent parent, UnlockableContent block){
+        TechNode.context = all.find(t -> t.content == parent);
         return node(block, () -> {});
     }
 
@@ -350,17 +358,17 @@ public class TechTree implements ContentList{
         static TechNode context;
 
         public TechNode parent;
-        public final Block block;
+        public final UnlockableContent content;
         public final ItemStack[] requirements;
         public final Array<TechNode> children = new Array<>();
 
-        TechNode(TechNode ccontext, Block block, ItemStack[] requirements, Runnable children){
+        TechNode(TechNode ccontext, UnlockableContent content, ItemStack[] requirements, Runnable children){
             if(ccontext != null){
                 ccontext.children.add(this);
             }
 
             this.parent = ccontext;
-            this.block = block;
+            this.content = content;
             this.requirements = requirements;
 
             context = this;
@@ -369,8 +377,8 @@ public class TechTree implements ContentList{
             all.add(this);
         }
 
-        TechNode(Block block, ItemStack[] requirements, Runnable children){
-            this(context, block, requirements, children);
+        TechNode(UnlockableContent content, ItemStack[] requirements, Runnable children){
+            this(context, content, requirements, children);
         }
     }
 }
diff --git a/core/src/mindustry/mod/ContentParser.java b/core/src/mindustry/mod/ContentParser.java
index b26cf3f4f5..021ca3f97f 100644
--- a/core/src/mindustry/mod/ContentParser.java
+++ b/core/src/mindustry/mod/ContentParser.java
@@ -242,8 +242,9 @@ public class ContentParser{
 
                 //add research tech node
                 if(research[0] != null){
+                    //TODO only works with blocks
                     Block parent = find(ContentType.block, research[0]);
-                    TechNode baseNode = exists && TechTree.all.contains(t -> t.block == block) ? TechTree.all.find(t -> t.block == block) : TechTree.create(parent, block);
+                    TechNode baseNode = exists && TechTree.all.contains(t -> t.content == block) ? TechTree.all.find(t -> t.content == block) : TechTree.create(parent, block);
                     LoadedMod cur = currentMod;
 
                     postreads.add(() -> {
@@ -254,7 +255,7 @@ public class ContentParser{
                             baseNode.parent.children.remove(baseNode);
                         }
 
-                        TechNode parnode = TechTree.all.find(t -> t.block == parent);
+                        TechNode parnode = TechTree.all.find(t -> t.content == parent);
                         if(parnode == null){
                             throw new IllegalArgumentException("Block '" + parent.name + "' isn't in the tech tree, but '" + block.name + "' requires it to be researched.");
                         }
diff --git a/core/src/mindustry/ui/dialogs/PlanetDialog.java b/core/src/mindustry/ui/dialogs/PlanetDialog.java
index c24b865f8b..7336297e77 100644
--- a/core/src/mindustry/ui/dialogs/PlanetDialog.java
+++ b/core/src/mindustry/ui/dialogs/PlanetDialog.java
@@ -411,7 +411,7 @@ public class PlanetDialog extends FloatingDialog{
                 Tmp.v31.set(selected.tile.v).rotate(Vec3.Y, -planet.getRotation()).scl(-1f).nor();
                 float dot = cam.direction.dot(Tmp.v31);
                 stable.getColor().a = Math.max(dot, 0f)*2f;
-                if(stable.getColor().a <= 0.001f){
+                if(dot*2f <= -0.1f){
                     stable.remove();
                     selected = null;
                 }
diff --git a/core/src/mindustry/ui/dialogs/TechTreeDialog.java b/core/src/mindustry/ui/dialogs/TechTreeDialog.java
index 9421cfe58c..dd42dfcc0f 100644
--- a/core/src/mindustry/ui/dialogs/TechTreeDialog.java
+++ b/core/src/mindustry/ui/dialogs/TechTreeDialog.java
@@ -180,7 +180,7 @@ public class TechTreeDialog extends FloatingDialog{
     }
 
     boolean locked(TechNode node){
-        return node.block.locked();
+        return node.content.locked();
     }
 
     class LayoutNode extends TreeNode<LayoutNode>{
@@ -224,7 +224,7 @@ public class TechTreeDialog extends FloatingDialog{
             infoTable.touchable(Touchable.enabled);
 
             for(TechTreeNode node : nodes){
-                ImageButton button = new ImageButton(node.node.block.icon(Cicon.medium), Styles.nodei);
+                ImageButton button = new ImageButton(node.node.content.icon(Cicon.medium), Styles.nodei);
                 button.visible(() -> node.visible);
                 button.clicked(() -> {
                     if(moved) return;
@@ -271,7 +271,7 @@ public class TechTreeDialog extends FloatingDialog{
                     button.setPosition(node.x + panX + width / 2f, node.y + panY + height / 2f + offset, Align.center);
                     button.getStyle().up = !locked(node.node) ? Tex.buttonOver : !data.hasItems(node.node.requirements) ? Tex.buttonRed : Tex.button;
                     ((TextureRegionDrawable)button.getStyle().imageUp)
-                    .setRegion(node.visible ? node.node.block.icon(Cicon.medium) : Icon.lock.getRegion());
+                    .setRegion(node.visible ? node.node.content.icon(Cicon.medium) : Icon.lock.getRegion());
                     button.getImage().setColor(!locked(node.node) ? Color.white : Color.gray);
                 });
                 addChild(button);
@@ -305,16 +305,16 @@ public class TechTreeDialog extends FloatingDialog{
         }
 
         void unlock(TechNode node){
-            data.unlockContent(node.block);
+            data.unlockContent(node.content);
             data.removeItems(node.requirements);
-            showToast(Core.bundle.format("researched", node.block.localizedName));
+            showToast(Core.bundle.format("researched", node.content.localizedName));
             checkNodes(root);
             hoverNode = null;
             treeLayout();
             rebuild();
             Core.scene.act();
             Sounds.unlock.play();
-            Events.fire(new ResearchEvent(node.block));
+            Events.fire(new ResearchEvent(node.content));
         }
 
         void rebuild(){
@@ -343,11 +343,11 @@ public class TechTreeDialog extends FloatingDialog{
             infoTable.table(b -> {
                 b.margin(0).left().defaults().left();
 
-                b.button(Icon.info, Styles.cleari, () -> ui.content.show(node.block)).growY().width(50f);
+                b.button(Icon.info, Styles.cleari, () -> ui.content.show(node.content)).growY().width(50f);
                 b.add().grow();
                 b.table(desc -> {
                     desc.left().defaults().left();
-                    desc.add(node.block.localizedName);
+                    desc.add(node.content.localizedName);
                     desc.row();
                     if(locked(node)){
                         desc.table(t -> {
@@ -376,8 +376,8 @@ public class TechTreeDialog extends FloatingDialog{
             });
 
             infoTable.row();
-            if(node.block.description != null){
-                infoTable.table(t -> t.margin(3f).left().labelWrap(node.block.displayDescription()).color(Color.lightGray).growX()).fillX();
+            if(node.content.description != null){
+                infoTable.table(t -> t.margin(3f).left().labelWrap(node.content.displayDescription()).color(Color.lightGray).growX()).fillX();
             }
 
             addChild(infoTable);
diff --git a/desktop/src/mindustry/desktop/steam/SStats.java b/desktop/src/mindustry/desktop/steam/SStats.java
index d8864a1dd0..6802834e0d 100644
--- a/desktop/src/mindustry/desktop/steam/SStats.java
+++ b/desktop/src/mindustry/desktop/steam/SStats.java
@@ -226,7 +226,7 @@ public class SStats implements SteamUserStatsCallback{
         Events.on(ResearchEvent.class, e -> {
             if(e.content == Blocks.router) researchRouter.complete();
 
-            if(!TechTree.all.contains(t -> t.block.locked())){
+            if(!TechTree.all.contains(t -> t.content.locked())){
                 researchAll.complete();
             }
         });