Thank you gentlemen for the information. I checked my counter weights and they are tight and secure. No sloppiness at all. I plan on purchasing some of those roller bearing bench assemblies for stationery testing trains. I see a couple different models on Ebay. Any recommendations on what works best? I see some Bachmann E-Z Rollers on Ebay but can't find them listed on the Backmann site.

I recently walked into a hobby shop I sometimes frequent and couldn't pass up the deal the owner presented me on a Spectrum 1/20.3 K-27 #255 with snow plow. He had it on an upper shelf in the store for a very long time and wanted to move it. He told me it was one of the original releases. I have read where the counter weights on these engines is problematic and wanted to know how I can tell if I have one of these? I won't be able to run it for a few months as I'm moving my garden railroad location to a more spacious location.