This would be hard to do. You'd have to do the scripting for all of the items there are in Graal. Body making would become more dificult, due to new actions that may have to be done according to the items. I think we may be better off having a selection of different ones possible to do, so that it is less work. Maybe shops could have other ones possible to preview and buy.

This is only my opinion. Your idea is still good, just difficult to work with.