Finish off the rendering for the upgrades.

src/main/java/techreborn/client/container/builder/ContainerTileInventoryBuilder.java

@@ -119,7 +119,7 @@ public class ContainerTileInventoryBuilder {
 	private ContainerTileInventoryBuilder upgradeSlots(IUpgradeable upgradeable){
 		if(upgradeable.canBeUpgraded()){
 			for (int i = 0; i < upgradeable.getUpgradeSlotCount(); i++) {
-				this.parent.slots.add(new FilteredSlot(upgradeable.getUpgradeInvetory(), i, -22, i * 22 + 5)
+				this.parent.slots.add(new FilteredSlot(upgradeable.getUpgradeInvetory(), i, -19, i * 18 + 12, 1)
 					.setFilter(stack -> stack.getItem() instanceof IUpgrade));
 			}
 		}

src/main/java/techreborn/client/container/builder/slot/FilteredSlot.java

@@ -33,11 +33,17 @@ import java.util.function.Predicate;
 public class FilteredSlot extends Slot {
 
 	private Predicate<ItemStack> filter;
+	private int stackLimit = 64;
 
 	public FilteredSlot(final IInventory inventory, final int index, final int xPosition, final int yPosition) {
 		super(inventory, index, xPosition, yPosition);
 	}
 
+	public FilteredSlot(final IInventory inventory, final int index, final int xPosition, final int yPosition, int stackLimit) {
+		super(inventory, index, xPosition, yPosition);
+		this.stackLimit = stackLimit;
+	}
+
 	public FilteredSlot setFilter(final Predicate<ItemStack> filter) {
 		this.filter = filter;
 		return this;
@@ -51,4 +57,9 @@ public class FilteredSlot extends Slot {
 			return true;
 		}
 	}
+
+	@Override
+	public int getSlotStackLimit() {
+		return stackLimit;
+	}
 }

src/main/java/techreborn/client/gui/GuiBase.java

@@ -100,9 +100,10 @@ public class GuiBase extends GuiContainer {
 		if(tile instanceof IUpgradeable){
 			IUpgradeable upgradeable = (IUpgradeable) tile;
 			if(upgradeable.canBeUpgraded()){
-				for (int i = 0; i < upgradeable.getUpgradeSlotCount(); i++) {
-					drawSlot(-22, i * 22 + 5, Layer.BACKGROUND);
-				}
+//				for (int i = 0; i < upgradeable.getUpgradeSlotCount(); i++) {
+//					drawSlot(-22, i * 22 + 5, Layer.BACKGROUND);
+//				}
+				builder.drawUpgrades(this, upgradeable, guiLeft, guiTop);
 			}
 		}
 	}

src/main/java/techreborn/client/gui/TRBuilder.java

@@ -35,6 +35,7 @@ import net.minecraft.util.text.translation.I18n;
 import net.minecraftforge.fluids.FluidStack;
 import net.minecraftforge.fml.client.config.GuiUtils;
 import net.minecraftforge.fml.common.Loader;
+import reborncore.api.tile.IUpgradeable;
 import reborncore.client.guibuilder.GuiBuilder;
 import reborncore.common.powerSystem.PowerSystem;
 import techreborn.lib.ModInfo;
@@ -330,6 +331,11 @@ public class TRBuilder extends GuiBuilder {
 		gui.drawTexturedModalRect(posX, posY, 150, 0, 18, 18);
 	}
 
+	public void drawUpgrades(GuiScreen gui, IUpgradeable upgradeable, int posX, int posY) {
+		Minecraft.getMinecraft().getTextureManager().bindTexture(GUI_SHEET);
+		gui.drawTexturedModalRect(posX -27, posY + 4, 126, 151, 30, 87);
+	}
+
 	public void drawOutputSlot(GuiScreen gui, int posX, int posY) {
 		Minecraft.getMinecraft().getTextureManager().bindTexture(GUI_SHEET);
 		gui.drawTexturedModalRect(posX, posY, 150, 18, 26, 26);

src/main/java/techreborn/items/ItemUpgrades.java

@@ -57,6 +57,7 @@ public class ItemUpgrades extends ItemTRNoDestroy implements IUpgrade {
 		setUnlocalizedName("techreborn.upgrade");
 		setHasSubtypes(true);
 		setCreativeTab(TechRebornCreativeTabMisc.instance);
+		setMaxStackSize(1);
 	}
 
 	public static ItemStack getUpgradeByName(String name, int count) {