diff --git a/src/main/java/com/raoulvdberge/refinedstorage/gui/GuiCraftingPreview.java b/src/main/java/com/raoulvdberge/refinedstorage/gui/GuiCraftingPreview.java
index fb600aeba..fa5660539 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/gui/GuiCraftingPreview.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/gui/GuiCraftingPreview.java
@@ -178,7 +178,7 @@ public class GuiCraftingPreview extends GuiBase {
                 }
             }
         } else {
-            int slot = scrollbar != null ? (scrollbar.getOffset() * 2) : 0;
+            int slot = scrollbar != null ? (scrollbar.getOffset() * 3) : 0;
 
             RenderHelper.enableGUIStandardItemLighting();
             GlStateManager.enableDepth();
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/item/ItemCore.java b/src/main/java/com/raoulvdberge/refinedstorage/item/ItemCore.java
index 550c3ad1b..bc49fb102 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/item/ItemCore.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/item/ItemCore.java
@@ -12,8 +12,8 @@ import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 
 public class ItemCore extends ItemBase {
-    public static final int TYPE_CONSTRUCTION = 0;
-    public static final int TYPE_DESTRUCTION = 1;
+    private static final int TYPE_CONSTRUCTION = 0;
+    private static final int TYPE_DESTRUCTION = 1;
 
     public ItemCore() {
         super(new ItemInfo(RS.ID, "core"));