Progress, Mike I like that 
There are a couple inconsistencies above (and an aesthetic matter):
AS!2 or AS!3? I see both mentioned. AS!3 is significantly superior to AS!3 in speed, memory management and goodness knows what else beneath the hood.
It's advised not to carry out any operations on JPEGs, unless it's purely for display purposes. Stick to 100% lossless storage formats once you've stacked, like 24-bit TIFF or 24-bit PNG.
More black space around the planets (add it right before publishing) costs very little but makes a ton of difference to the aesthetics.
Saturn (not your Saturn, but Saturn in general) is weird. Even though it hangs low in the south, I can often get sharper data from Saturn than I can from higher, brighter Jupiter. Go figure. You're not alone.
Best Wishes,
Grant
P.S. A cardboard box with appropriate pieces cut out (or made into flaps) is great at preventing dew on computers. I have my laptop inside a "laptop tent" which I got off Amazon and it really works great, as well as insulating sufficiently to keep it warm enough in winter. I use a second monitor in my observatory setup and I stapled a large, horizontal triangle of heavy cardboard to the walls in the corner where it sits - that works to keep dew off that monitor. My USB3 hub has an old t-shirt doubled over a couple times and placed over it to keep dew/frost out of the connections 