I started in N-scale back in the mid-60's and got locked in with the larger rail. Seems to me code-55 would make a much more realistic layout but then I couldn't run my old Atlas Steam locos. Most of my diesels should handle code 55 so I think I'll build a test loop to see how my existing fleet handles it. Might need to add a switch to see how the wheels handle the frogs. Anyone have any proplems using code 55?