One week later and still no response from the service department??    

Thanks! I have sent a message to the service dept' but will have to wait till Monday night for a reply as I am in Australia and there is a considerable time difference. My location also makes it problematic in returning items for repair as things can go missing in the post particularly over longer distances.

G'day all, I have a Spectrum Baldwin Consolidation that has binding axles I think due to miss alignment of the crank pins. It has 2 tight spots in every full rotation and locks up and stops  going forward and just jerks and wobbles through the tight spots in reverse. I have adjusted the crank angle slightly on the rear set as this seems to be the problem area but this seems to make one spot tighter and the other slightly better.
Anyone have some ideas?
Also is there available a replacement final drive gear for these locos?
Thanks.

G'Day, are the mechanicals and chassie the same on the light and heavy class mountains loco's? I am trying to get a light for scratch building into  local [ SAR- South Australian Railways ] loco's and seem to only be able to find heavy mountains on the net. Thanks!