Mike, Brian, Brwebster, and Mark . . .
Many thanks for your comments and contributions to this thread. I apologize for missing some of these comments and for taking so long to respond. I have spent quite a few hours pondering how to accomplish just the right blend of narrow gauge and also a standard gauge exchange. The ideas are still a work in progress. I have not yet committed any final thoughts to paper. I will creat some type of update when I can.