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The seeing is terrible tonight, whenever we have strong westerly winds it's almost a given.
The 3 notches you see are the shadows of the mirror clips and nothing to be concerned about. The optics do not seem to be pinched, usually shows as a triangular out of focus star test image. Google pinched optics and check the images of the different aberrations presented as examples.
Your collimation is slightly out as the secondary shadow is slightly off centre, a bit of fine tuning will sort that out.
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