What a bummer the locomotive will not pull all the cars in the set. I am going to order the over size cylinders for it hope that helps.
What locomotive are you talking about? I have a Fort Wilderness Live Steam Loco (jazzed up Ruby) and I only bought three cars because someone said that the ruby would never pull all that weight. Boy were they wrong! I need about four more to help keep the speed down!
It's true, that out of the box it was a poor runner in forward, but by reversing the ecentrics 180 degrees, I have more power than I need for just three cars. There is a whole thread somewhere in the archives about accomplishing this for Ruby's. But let me tell you, my FWRR will pull a very big load!
Scott