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You may not want to hear this, but I have the same OTA’s as you; a C9.25 XLT CF and a WO 80mm Apo triplet and they are mounted on a Tak EM200 with the orange Celestron CGE dovetail rail (a Losmandy fit).
The (wider) CGE dovetail, like your (narrower) Vixen style dovetail, fits to the OTA with the same 3 screws. I don’t experience the same wobbles you describe, although our interpretations and grading of these wobbles could obviously be quite different.
Suffice to say, the OTA is quite rigid on the mount and when adjusting the focus via the C9.25 focus knob, I don’t experience any unacceptable wobble, the main component being the ubiquitous slight image shift.
So, I’m not sure you would gain the improvement you are looking for, if the mount itself is an equal contributor to the wobbles?
Cheers
Dennis
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