I've got 10 or 12 of the FAs, all with the fat can motors, but none of them have flywheels. The two E-units also have the big motors, and flywheels. With the full-width carbody and ample-size motor, there's plenty of room to add some weight: The FA weighs 16 oz., the FPA 23.5 oz., and the FPB 26 oz. Real workhorses.
Wayne
Wayne