Hi Elliot • My layout is 42 inch, I should have made the bench work handle 72 inch. If you can change your bench work and have the floor space. Go with 72 inch. The long trains look so much better. PS - My wife is from Ouray, CO - What cities are you going to have on this layout? I have spent a lot of time in this part of the USA. The 72 inch may not look prototypical.
My Two Cents
Gary, from Michigan
Click Photo to enlarge.