Hello all. I'm working on a quick little plugin that adds recipes that I feel should be a part of Minecraft, but are not. Things like turning sandstone back into sand, or unstickifying a piston. My question is: how does one either not consume a set item in the recipe, or how to set it back in as a different ItemStack? Pretty much, how do I replicate the Cake recipe in Bukkit's ShapedRecipe class? Specifically, I would like to "grind stone into sand" by having cobble and obsidian in the grid, but not consume the obsidian block. Thanks in advance!