Hi,
I have a similar problem, noticed that the RA axis has a little bit of play, and I think is producing a little bit more noise under mod loading. I decided to go for the hyper tune with bearings (after getting good reviews) prior to determining the problem, as I might as well do the tune while I am in there. Hopefully I haven't bent a worm. I am yet to strip the mount down, as I have exams in two weeks, but will attempt it shortly after. Can let you know how it goes if you're still undecided.
Good luck
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