Under certain conditions you can copy things in the workbench

[Dima8249]

To copy a thing you must complete these steps:

1. craft something
2. Get out of the crafting grid and break some block nearby
3. go back to the workbench and you can see the items laid out in the crafting grid for a previously created item.

[Unarelith]

Ok so here's my current idea until the underlying system is fixed::

• Instead of sending the inventory from the client, there should be new packets
  • InvTakeItemStack: invID, x, y, stringID
  • InvPutItemStack: invID, x, y, stringID
  • InvMoveItemStack: invID, x, y, invID2, x2, y2, stringID
  • InvClearItemStack: invID, x, y, stringID