Ken, but Willie wrote "Crazy", made famous by Patsy Cline. And yes, I'm still crazy.
The Gn15 layout will have at least one Model T, that alone may dictate how large the thing will be. I love my old cars and have way too many to use on my current layout, besides there were no 49' Merc's in 1920 New Mexico!
Back to some kind of future.