Ok thanks guys, that helps.
I'll try the pixinsight method first, and perhaps go from there. I was thinking I might be able to verify the manufacturers results, just because why not. But if it's not a thing people do really, I'll leave it also.
It would be a useful service to offer people though if you had access to an interferometer as there could be a market for this. People spend loads on scopes, would be nice to verify the optics, aside from pixel peeping.
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