The real test of any mount is can you get round stars at 10minute exposures at a decent focal length. If you can its a winner.
Other things help but are not essential. That's the guts of it.
Also with a good mount round stars are not guaranteed. A good PEC and accurate polar alignment are pretty important. I use Sky X Tpoint for getting perfect polar alignment. Its an amazing tool and you see the results immediately in the very low autoguiding errors.
Greg.
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