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Hi Chris love your perseverance with this I think you’re getting there. I will re-emphasise what Steve said, flats need to be taken along with every data set unless there’s absolutely zero movement/adjustment of the camera or image train (or little bits of dust inside). The darks will last for many months.
Something that I do with APP is I stack different nights as individual data sets and then stack those sets together. It allows me more control over the quality of the data as some nights, even with the best intentions will end up in the bin due to atmospheric instability or high cloud etc. you will only hurt your final image by trying to include poor data.
It might be interesting if you posted a link to your raw unprocessed fits stack. I’d be interested to see what the raw data vs processed result looks like as I still think those brighter areas are either overexposed or perhaps it’s a function of processing?
Great work mate keep it up!!
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