Just came across this new video posted to YouTube:
The author shows how to completely tear down, clean and upgrade the SkyWatcher mount, for those who are interested and mechanically inclined or curious. The main idea in the rebuild was to change out all the bearings used by the manufacturer with upgraded replacements (sounds familiar). One item to note is that the ring gear is not exactly a gear, but is a hollow brass cylinder with a ring gear machined into the end. I suppose this design may keep the ring teeth positioned very closely perpendicular to the rotational axis, and also not allow any deviation away from the worm gear.?
All food for thought.