Hello, new member, first post. Looking for help. I bought an HO Lionel PA-1 model recently and was surprised to find it was mechanically in good shape (motor runs strong and gears don't bind). I am relatively sure this 1950's model used springs to transfer power from the drive shaft to the trucks (a belt would require disassembly of the trucks to install). Any suggestions on where to come up with appropriate part? Sorry, I do not have a camera capable of taking a decent photo so I will describe as well as I can. The drive mechanism is in essence a drive shaft with a flywheel mounted on it above another flywheel on the truck gears. The two have to be connected. Thanks in advance...