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A great start Carlton.
May I ask... did you use a feature in your processing that you sort to reduce the star size?
I ask because I sometimes use a feature in Gimp called "erode" which sometimes works but other times produces the effect I notice with your stars in your image where they seem a little squiggly...if you have use such a feature try avoiding it and it may repair your stars.
Also I have yet to take a sub with an exposure over 60 seconds but I certainly take a few...all I am getting at is 90 seconds should work for you...
You may care to try a 3x drizzle in DSS ..I am pretty sure it helps a lot but slows things down heaps and you end up with a 1.5 gig image which I crop in StarTools and binn to get it manageable.
If noise is a problem may I suggest that you dither and also take some dark frames.
In any event I think you have done a great job here and you can be very proud that you bagged your image.
Alex
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