Or just make it so that there's a crafting system and you can use the parts to make things like modifications to your sparrow (a gun on a sparrow?) or you own weaponry/armor. You can still do levels in the crafting but it could be specific to the class. Maybe a warlock can make things that a Titan can't. Maybe Hunters can make augmentations to their own armor while Titans can make modifications to their vehicles...I dunno, just thinking. I agree though, there should be a use for the 1k plasteel plating that I have.