diff --git a/build.gradle b/build.gradle
index ddef997065..2c1d30bc28 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,7 @@ allprojects {
         gdxVersion = '1.9.8'
         roboVMVersion = '2.3.0'
         aiVersion = '1.8.1'
-        uCoreVersion = 'b93d02efe3fdbe1a10b33d59597da8693d4f7de3'
+        uCoreVersion = '3352bd2408'
 
         getVersionString = {
             String buildVersion = getBuildVersion()
diff --git a/core/src/io/anuke/mindustry/content/UnitTypes.java b/core/src/io/anuke/mindustry/content/UnitTypes.java
index e17da55df6..1e56aa5df1 100644
--- a/core/src/io/anuke/mindustry/content/UnitTypes.java
+++ b/core/src/io/anuke/mindustry/content/UnitTypes.java
@@ -1,6 +1,7 @@
 package io.anuke.mindustry.content;
 
 import com.badlogic.gdx.utils.Array;
+import com.badlogic.gdx.utils.ObjectSet;
 import io.anuke.mindustry.entities.units.UnitType;
 import io.anuke.mindustry.entities.units.types.*;
 import io.anuke.mindustry.game.Content;
@@ -69,6 +70,7 @@ public class UnitTypes implements ContentList{
             buildPower = 0.9f;
             minePower = 1.1f;
             healSpeed = 0.09f;
+            toMine = ObjectSet.with(Items.lead, Items.tungsten, Items.titanium);
         }};
     }
 
diff --git a/core/src/io/anuke/mindustry/entities/units/UnitType.java b/core/src/io/anuke/mindustry/entities/units/UnitType.java
index 848ef6d372..20c2dc5b54 100644
--- a/core/src/io/anuke/mindustry/entities/units/UnitType.java
+++ b/core/src/io/anuke/mindustry/entities/units/UnitType.java
@@ -2,11 +2,14 @@ package io.anuke.mindustry.entities.units;
 
 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 import com.badlogic.gdx.utils.Array;
+import com.badlogic.gdx.utils.ObjectSet;
+import io.anuke.mindustry.content.Items;
 import io.anuke.mindustry.content.Weapons;
 import io.anuke.mindustry.entities.traits.TypeTrait;
 import io.anuke.mindustry.game.Content;
 import io.anuke.mindustry.game.Team;
 import io.anuke.mindustry.game.UnlockableContent;
+import io.anuke.mindustry.type.Item;
 import io.anuke.mindustry.type.Weapon;
 import io.anuke.mindustry.ui.ContentDisplay;
 import io.anuke.ucore.function.Supplier;
@@ -37,7 +40,7 @@ public class UnitType implements UnlockableContent{
     public float carryWeight = 1f;
     public int ammoCapacity = 100;
     public int itemCapacity = 30;
-    public int mineLevel = 2;
+    public ObjectSet<Item> toMine = ObjectSet.with(Items.lead, Items.tungsten);
     public float buildPower = 0.3f, minePower = 0.7f, healSpeed = 0.1f;
     public Weapon weapon = Weapons.blaster;
     public float weaponOffsetX, weaponOffsetY;
diff --git a/core/src/io/anuke/mindustry/entities/units/types/Drone.java b/core/src/io/anuke/mindustry/entities/units/types/Drone.java
index f51229f6cf..4be5aa60d9 100644
--- a/core/src/io/anuke/mindustry/entities/units/types/Drone.java
+++ b/core/src/io/anuke/mindustry/entities/units/types/Drone.java
@@ -1,9 +1,7 @@
 package io.anuke.mindustry.entities.units.types;
 
 import com.badlogic.gdx.graphics.Color;
-import com.badlogic.gdx.utils.ObjectSet;
 import com.badlogic.gdx.utils.Queue;
-import io.anuke.mindustry.content.Items;
 import io.anuke.mindustry.content.blocks.Blocks;
 import io.anuke.mindustry.entities.TileEntity;
 import io.anuke.mindustry.entities.Units;
@@ -41,7 +39,6 @@ import java.io.IOException;
 import static io.anuke.mindustry.Vars.*;
 
 public class Drone extends FlyingUnit implements BuilderTrait{
-    protected static ObjectSet<Item> toMine;
     protected static float discoverRange = 120f;
     protected static boolean initialized;
 
@@ -77,7 +74,7 @@ public class Drone extends FlyingUnit implements BuilderTrait{
 
                 //if it's missing requirements, try and mine them
                 for(ItemStack stack : entity.recipe.requirements){
-                    if(!core.items.has(stack.item, stack.amount) && toMine.contains(stack.item)){
+                    if(!core.items.has(stack.item, stack.amount) && type.toMine.contains(stack.item)){
                         targetItem = stack.item;
                         getPlaceQueue().clear();
                         setState(mine);
@@ -270,8 +267,6 @@ public class Drone extends FlyingUnit implements BuilderTrait{
     private static void initEvents(){
         if(initialized) return;
 
-        toMine = ObjectSet.with(Items.lead, Items.tungsten);
-
         Events.on(BlockBuildEvent.class, (team, tile) -> {
             EntityGroup<BaseUnit> group = unitGroups[team.ordinal()];
 
@@ -400,7 +395,7 @@ public class Drone extends FlyingUnit implements BuilderTrait{
         if(entity == null){
             return;
         }
-        targetItem = Mathf.findMin(toMine, (a, b) -> -Integer.compare(entity.items.get(a), entity.items.get(b)));
+        targetItem = Mathf.findMin(type.toMine, (a, b) -> -Integer.compare(entity.items.get(a), entity.items.get(b)));
     }
 
     protected boolean findItemDrop(){