Hi ood,
I checked out the use command and it looked straight-forward enough to add in $second difficulty.. so I have.
If you have the brain-space, have a test of it and let me know.
Remember you can always code the command called use then create a command called testuse and tinker until it works as you would like.
PS good luck with that old study thing your doing.
PPS I trust you saw how I used the combine cowmand to make new objects. Im slowly tinkering with the combine cowmand so that it recognises materialed objects was well as objects made by a specific object.
This way it can distinguish between anything with material _iron_ from any object called iron a user creates.
In fact I should probably make a strict variation that only works on materialed objects so there is no casual creating lumps of iron on demand.