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Hard to tell much from the defocussed star test except there is some strong aberration there amounting to waves. There is about 6 waves defocus and the out of roundness would be over a wave . A sequence of photos would show if those out of roundness was a transitory seeing thing or not . The collimation is also way off as well.
I would suggest collimate better and take more pictures which will help with a diagosis.
I can't help thinking provided the mirrors are ok that there is some mirror pinching going on there.
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