@Oman posted:Could it be the O-31 curve requirement? What is the minimum curve for these? I'm thinking of putting in an order for a possible 2nd run.
Well your big scale vision line diesels won't run on 0-31 I would think anyway. These are 0-54 curves and O-72 turnouts which I think has more to do with the way the motor is connected to the trucks than anything to do with the couplers swing. I'll post a video sometime this weekend.