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Finally I got to check out the results tonight. In 3 words: no noticeable improvement.
Actually there was some improvement, but that is probably only because I'm getting good at collimation. But the 'fuzziness' of focused stars essentially remained the same.
I'm also getting the hang of star testing and slowly learning what to look for. I noticed that the diffraction ring patterns look quite different inside and outside focus. Although it did not really look like any idealised star test pictures I've seen, the closest thing to what I've seen at the EP corresponds to spherical aberration. So next mod will be a 7" mask over the 8" mirror.
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