I just received a Bachmann On30 United Traction tram direct from the US. On using it, it shorted out my controller. Checking, the copperstrips connecting the lights to the power truck run very close to the metal U frame of the motor. In my case, there waws no clearance. The solution was to put a small piece of insulating tape on the motor frame. Anyone else experienced similar problems to this? PS I couldn't believe how small the motor was in these!