I got a 60051 and 60052 train set. I've noticed that the 60051 wheel slip a lot. I disassembled the train and basically combined the motor, sensor pod and wheels into one blob and ran only them. No problem ran like a champ. But when I started adding more and more of the train cab itself the slip starting showing up little by little. It wasn't until I added the front nose that the worst issues showed up. In comparison the 60052 train set works no problem. Is there a imbalance in the design of the 60051 the causes the the front to be heavy enough to cause slippage in the back?
