Not sure where you are going with this....rather than heroic efforts to salvage average data....maybe get better data?
Vixen Polarie's are compact, cheap, and work well. (there are other options, but a good quality tracker will help immensely)
Sure imaging from the burbs is not much fun, but if you do, it is all about maximising signal and minimising noise. Seems the first and critical bit, is being ignored here: let the signal build without being ruined.
Stick with it, but it will be hard to do much better leaving things as is.
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