Okay, since my last post on July 12th, I have converted to the EZ- nickel silver track. My layout is on two 4 x 6 foot sections joined together to make a 6 x 8 layout. I have 22 degree curves on the main line, and 18 degree curves on the two bypass lines. The engine is jumping the track, with the front wheels usually coming off first. I have checked the track joints carefully, and they are smooth.  I suspect I need to send the engine back to Bachman for repairs. I picked up an older Bachman diesel engine off ebay and it never derails.

I purchased the Overland Limited set for my step-grandson in Russia for this past Christmas. I immediately noticed he was too young for the unit, so I kept it until he comes later this summer. I initially noticed the problem with it derailing on curves. After a few adjustments I never experienced the problem again. However, I have little doubt the engine needs at least 22 degree and perferably 24 degree curves. 
      The train comes with a 63 by 54 inch oval, with 22 degree curves, which is too big for a 4 x 8. I have decided to switch to the nickel -silver track. I was going to get the "Your First Railroad Track Pack," however it only comes with the 18 degree curves. I want to go with the 22 or 24 degree curves. To be able to keep the same track design as shown in the package how many 22 or 24 degree curves will I need? The package comes with twenty 18 degree curves. What size layout will this make? I would also like to know the differences between the #5. #6, and #7 switches?