Which Bachmann locomotives easily handle the 15" radius? I plan a long L-shaped switching layout and I only have 32" for the loop. I assume the GE 70T and 40T are OK. But is there anything bigger among the F, GP, SD, etc that will still be at home on a 15"R? For rolling stock, I plan to stay in the 40' category and smaller. Are there any older passenger cars that would be OK on the 15"R?