I'm building a test assm. My assm has 2 parts A&B. Part B has 3 config's. I'm trying to drive a dimension in part A with a dimension from one of my config's of part B. In all three of these configs this Dimension is different. How do I specify this dimension from config B-3? It works if I make part B-3 the active configuration, but what if I use part B in a totally different Assm?