@Jeff: The drop in wheel sets sound great. I can work with the pilot. How hard is it to remove the lobster-claw couplers from the truck-pilot assembly? Is it screws or does it require some metal cutting with a Dremel?
BTW the part # for the 4-axle trucks is MTH part 20-89008 and its features are listed by MTH as:
- (4) Scale Wheel Wheel Sets
- Insulated Axles
- All-Metal Wheels & Axles
- Fully Assembled, Ready-to-Drop-In