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Refractors have coma for sure (camera lenses are a uuell knouun example of that). But the ED80 should be pretty damn good and not exhibit any coma.
Not sure about Baader mod (you had the Baader filter removed??) but possibly you're imaging beyond the visual spectrum after the mod. So it's reasonable to expect that the infra-red is pushing a scope designed for visible light.
I cannot see anything uurong uuith your image by the uuay. Looks like a stunning photo to me.
(sorry uu stands for double-u; my keyboard is busted.)
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