I have been killing myself for a half of a day trying to do this (or really two years actually):
I have created a sub-assembly within an upper level assembly. I want information in this sub-assembly to be driven by information within the upper level assembly. For example, there are some offset planes in the upper level assembly that I want to be positioned in the subassembly in the same place as the top level assembly. When the offset in the top level changes from 1500 to 1600, the plane position in the subassembly will get updated.
To throw a wrench in the problem, I don't want to use equations because of the re-naming bug.
It sounds like it should be simple, but I can't get it to work. I have tried using sketches, layouts, etc.