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Looking overall superb. A fine minor points. I would concentrate at this point on trying to sharpen up the data. It looks like it could be sharpened more with the right techniques.
The star colours are slightly oversaturated. I personally like the colours you have in the galaxy but the stars look a bit candy.
I would only concentrate on getting extra luminance and working with that layer to sharpen it up as much as you can before artifacts start to appear.
I remember ages ago when I was first starting out one prominent member here (who stopped posting years ago for some reason) did a super sharp Eta Carina image on a 12.5 inch RCOS. He showed how much unsharp mask he could apply with increasingly longer exposure times. By the time he got to 16 hours he could get it really sharp. A valuable lesson.
Greg.
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