Thanks, Paul, I think I've got it now. QSU works for me. I'm also going to order Bill Sheppard's book. Paul B Here's my "Quick, simple, ugly" (tm) map, simplifying down to what you asked for ("some lines omitted for clarity" - man, I love that disclaimer! :) - - Paul The Erie Lackawanna Mailing List Sponsored by the ELH&TS http://www.elhts.org ------------------------------