My beef with the KTM box is that it shows. I had heard of the bronze cluster - thought NWSL had made them special.
Chatter is a feature of worm drive gears. Minimizing that involves minimizing contact with the gearbox frame and the locomotive frame.
The motor shaft and gearbox shaft do not have to be co-axial. Their centerlines must cross at exactly the middle of the gap between them. This is how I got the giant 9434 motors to work on Cab Forwards (I only use 8000s now). The Toyota hose will act as a U-joint noiselessly and with very little friction loss.
