Originally Posted by RyDog:
Thanks, the pic didn't upload the first time
So what should I try to do to start if I want to do 2 levels?
if i do 5x9 then will I get a big advantage over 4x8?
Using a 5' x 9' allows you to use 048 curves for the outer loop and 036 for the second loop, elevated or same grade. That way the second loop doesn't have to go over top of the entire loop or have to be in 031. Using the largest curves that you can allows the trains to run better.