diff --git a/build.gradle b/build.gradle
index 357f066413..c2cb1c9052 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ allprojects {
         appName = "Mindustry"
         gdxVersion = '1.9.8'
         aiVersion = '1.8.1'
-        uCoreVersion = 'dae4fac'
+        uCoreVersion = 'f8a3b56'
     }
 
     repositories {
diff --git a/core/src/io/anuke/mindustry/ui/dialogs/SettingsMenuDialog.java b/core/src/io/anuke/mindustry/ui/dialogs/SettingsMenuDialog.java
index d20f880c8a..780701f399 100644
--- a/core/src/io/anuke/mindustry/ui/dialogs/SettingsMenuDialog.java
+++ b/core/src/io/anuke/mindustry/ui/dialogs/SettingsMenuDialog.java
@@ -113,15 +113,22 @@ public class SettingsMenuDialog extends SettingsDialog{
 		game.sliderPref("sensitivity", 100, 10, 300, i -> i + "%");
 		game.sliderPref("saveinterval", 90, 10, 5*120, i -> Bundles.format("setting.seconds", i));
 
-		graphics.checkPref("fps", false);
-		graphics.checkPref("vsync", true, b -> Gdx.graphics.setVSync(b));
-		graphics.checkPref("fullscreen", false, b -> {
-			if(b){
+		if(!android && !gwt) {
+			graphics.checkPref("vsync", true, b -> Gdx.graphics.setVSync(b));
+			graphics.checkPref("fullscreen", false, b -> {
+				if (b) {
+					Gdx.graphics.setFullscreenMode(Gdx.graphics.getDisplayMode());
+				} else {
+					Gdx.graphics.setWindowedMode(600, 480);
+				}
+			});
+
+			Gdx.graphics.setVSync(Settings.getBool("vsync"));
+			if(Settings.getBool("fullscreen")){
 				Gdx.graphics.setFullscreenMode(Gdx.graphics.getDisplayMode());
-			}else{
-				Gdx.graphics.setWindowedMode(600, 480);
 			}
-		});
+		}
+		graphics.checkPref("fps", false);
 		graphics.checkPref("lasers", true);
 		graphics.checkPref("indicators", true);
 		graphics.checkPref("healthbars", true);
@@ -140,11 +147,6 @@ public class SettingsMenuDialog extends SettingsDialog{
 			}
 			renderer.setPixelate(b);
 		});
-
-		Gdx.graphics.setVSync(Settings.getBool("vsync"));
-		if(!gwt && Settings.getBool("fullscreen")){
-			Gdx.graphics.setFullscreenMode(Gdx.graphics.getDisplayMode());
-		}
 	}
 
 	private void back(){
diff --git a/core/src/io/anuke/mindustry/world/blocks/types/distribution/Conveyor.java b/core/src/io/anuke/mindustry/world/blocks/types/distribution/Conveyor.java
index 722affa512..de8a3076b7 100644
--- a/core/src/io/anuke/mindustry/world/blocks/types/distribution/Conveyor.java
+++ b/core/src/io/anuke/mindustry/world/blocks/types/distribution/Conveyor.java
@@ -185,7 +185,6 @@ public class Conveyor extends Block{
 	 * Size is 4 bytes, or one int.
 	 */
 	public static class ConveyorEntity extends TileEntity{
-		private static ItemPos writePos = new ItemPos();
 
 		LongArray convey = new LongArray();
 		float minitem = 1, elapsed;
@@ -195,7 +194,7 @@ public class Conveyor extends Block{
 			stream.writeInt(convey.size);
 			
 			for(int i = 0; i < convey.size; i ++){
-				stream.writeInt(writePos.toInt(convey.get(i)));
+				stream.writeInt(ItemPos.toInt(convey.get(i)));
 			}
 		}
 		
@@ -206,7 +205,7 @@ public class Conveyor extends Block{
 			convey.ensureCapacity(amount);
 			
 			for(int i = 0; i < amount; i ++){
-				convey.add(writePos.getValue(stream.readInt()));
+				convey.add(ItemPos.toLong(stream.readInt()));
 			}
 			
 			sort(convey.items, convey.size);
@@ -251,25 +250,14 @@ public class Conveyor extends Block{
 	
 	//Container class. Do not instantiate.
 	static class ItemPos{
+		private static short[] writeShort = new short[4];
+		private static byte[] writeByte = new byte[4];
+
 		Item item;
 		float x, y;
 		byte seed;
 		
 		private ItemPos(){}
-		
-		ItemPos set(int value){
-			byte[] values = Bits.getBytes(value);
-
-			if(values[0] >= Item.getAllItems().size || values[0] < 0)
-				item = null;
-			else
-				item = Item.getAllItems().get(values[0]);
-
-			x = values[1] / 127f;
-			y = ((int)values[2] + 128) / 255f;
-			seed = values[3];
-			return this;
-		}
 
 		ItemPos set(long lvalue){
 			short[] values = Bits.getShorts(lvalue);
@@ -290,7 +278,7 @@ public class Conveyor extends Block{
 		}
 		
 		static long packItem(Item item, float x, float y, byte seed){
-			short[] shorts = Bits.getShorts(0);
+			short[] shorts = Bits.getShorts();
 			shorts[0] = (short)item.id;
 			shorts[1] = (short)(x*Short.MAX_VALUE);
 			shorts[2] = (short)((y - 1f)*Short.MAX_VALUE);
@@ -298,22 +286,37 @@ public class Conveyor extends Block{
 			return Bits.packLong(shorts);
 		}
 
-		static int packItemInt(Item item, float x, float y, byte seed){
-			byte[] bytes = Bits.getBytes(0);
-			bytes[0] = (byte)item.id;
+		static int toInt(long value){
+			short[] values = Bits.getShorts(value, writeShort);
+
+			short itemid = values[0];
+			float x = values[1] / (float)Short.MAX_VALUE;
+			float y = ((float)values[2]) / Short.MAX_VALUE + 1f;
+			byte seed = (byte)values[3];
+
+			byte[] bytes = writeByte;
+			bytes[0] = (byte)itemid;
 			bytes[1] = (byte)(x*127);
 			bytes[2] = (byte)(y*255-128);
 			bytes[3] = seed;
+
 			return Bits.packInt(bytes);
 		}
 
-		int toInt(long value){
-			set(value);
-			return packItemInt(item, x, y, seed);
-		}
+		static long toLong(int value){
+			byte[] values = Bits.getBytes(value, writeByte);
 
-		long getValue(int value){
-			return set(value).pack();
+			byte itemid = values[0];
+			float x = values[1] / 127f;
+			float y = ((int)values[2] + 128) / 255f;
+			byte seed = values[3];
+
+			short[] shorts = writeShort;
+			shorts[0] = (short)itemid;
+			shorts[1] = (short)(x*Short.MAX_VALUE);
+			shorts[2] = (short)((y - 1f)*Short.MAX_VALUE);
+			shorts[3] = seed;
+			return Bits.packLong(shorts);
 		}
 	}
 }