I have a new Bachmann Spectrum 2-8-0 that I seem to be having a problem keeping on the rails. My layout has 19", 11" and one 9 3/4 " radius curves. The front trucks of the locomotive will derail randomly going into the curve. At first I thought it was the 9 3/4 curve. But, it's now happening on any radius curve. I've also noticed that the front trucks seem to be rubbing on the front of both steam cylinders. I can see where some paint is already worn off. It looks to me like the front trucks are mounted to close to the steam cylinder. Any ideas no how I can fix this ? PS It also very, very slow. I've tried loosening the three screws on the retaining plate but it didn't help.