Once you have created mechanical routing runs, can you have NX automatically create the Logical Diagram for you? What about the other way around (creating the diagram, and having the 3D geometry populated automatically? In the Learning Advantage tutorials it just showed you how to create them independently and then compare them based on user defined names, but that seems like a tedious and inefficient approach.
Also, once the association exists, how associative is it? Can you rearrange the runs in the diagram and have the 3D geometry update automatically?