The current mechanics allows for using #2# to require 2lbs of an item, which is good, except when your crafting something that needs a large single piece of something. Say you're making a club out of bone and you want to require a single 2lb bone (i.e. Elk bone, etc)... if you use #2# it allows you to use any combination of bones that add up to 2lbs, so you could make a bone club out of 4 0.5lb hare bones.
Could we maybe get a tag in the future that is something like [singlepiece] or similar to indicate that the #weight# tag has to be from one piece?