hi
it sounds like it is binding or slipping on the cogwheels inside the mount, you need to check the wormgear adjustment.
i have done a hypertune on mine, and it had binding when i was adjusting the wormgears, and it sounds like you describe.
it has nothing to do with the other parts, it is a adjustment thing, im sure.
so dont use time on the other things now, check out astrobabes webpage, and do the adjustment after here write-up, and your problems will dissapear, i promise.
alfi
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