1 pointNot sure if I understand your question correctly (haven't had my morning coffee yet). If you want to know exactly which parts you need besides the ones you already have, there is a green button on the right 'Build this MOC'. This gives you the list of missing parts, with links to add them to a Bricklink or Brickowl wanted list. This button is basically why Rebrickable was created
1 pointIs there a way to add a location to a set in our set list? I keep my sets in zip lock bags. Then those bags get put into organizers. Each drawer is labeled with a number and inside each drawer it is sub divided. It would be nice to pull the set up on rebrickable and quickly know where to look for the set, ie - Drawer 12, section c (12-c or 12c). Obviously this would only be a field we could edit and see but it would be nice especially when we are pulling parts to build other sets. Any thoughts?