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I could only comment that Saturn is quite low down now, so looking at Saturn isn't a great test - that's a lot of atmosphere to look through. How does Jupiter look when it is high in the sky - around 10-11pm? Are you seeing some surface details at high magnification - a bit of banding should be seen if seeing is OK. How do stars look with the star test as you wind the focusser in and out around the focus point? Are you resolving the double stars at Alpha Centauri?
Beyond that, it sounds like there is something very wrong with the mounting of the focusser. How does it look when you work your way around looking at it from every angle? Does it look "square" to the OTA? Take a couple of photos and post them here - maybe someone can spot the problem.
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