I'm glad to see you got the old girl up & running again... Congrats, you have a handsome set that you should be proud of. I've always loved watching the earlier standard gauge locos with their connecting rods gliding down the rails. As for the single motor 42's limited pulling power, our grandfather fixed that problem with a little ingenuity many years ago. He epoxied a pair of triangular shaped lead weights in the corner spaces on the underside of the connecting plate used for attaching the motor to the engine's body. They may not be very large, but lead is quite heavy, and these weights added about a pound of weight, directly over the driving wheels. The only drawback being they make the motor run a little hotter than usual, so you can only run it for about ten minutes before you have to give it a rest. But other than that, it runs fine.