What are the differences with the driving wheels and driving rods of Bachmann's original HO scale K4 side rods and driving wheels #5404 vs the net edition #1351? Are they the same and interchangeable? I've been contacted by an owner of a  #1351 wheel/rods set - if they are interchangeable, my problem is solved. I recall the #5404 engine had gearing problems creating the need for a redesign.

I'm looking for side rods for a Bachmann K-4 which I understand isn't made anymore as the engine has been discontinued.

What can I do to get some so this will look like a beauty again?



Thanks in advance.