You have some nice images there, especially Saturn. Don't worry about the "weirdness" in the rings, they are just sharpening effects, WinJupos won't/can't remove that. Is the blue dot on the Neptune image Triton? If not, it's pretty easy to extract from the stacked image of Neptune, the moons of Uranus are much harder
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Just a little advice for next time if you don't mind
Capture Jupiter for 3 minutes, Saturn, Uranus and Neptune for 5. Don't worry about planetary rotational blurring at those time periods, but you may see some field rotation when you are looking for the moons (which can be removed in Autostakkert if you want). I assume you are on an alt/az mount (like me).
The detail you are seeing in Neptune is just sharpened noise, but you should be able to easily bring up Triton in Photoshop.
I use following settings on my C9.25" SCT, 2.5x Powermate and ASI224MC camera which you might want to use as a guide for next time:
Jupiter: 6.66ms shutter, 280 gain, 150 fps, 3 min
Saturn: 10ms shutter, 380 gain, 100 fps, 5 min
Uranus: 50ms shutter , 400-450 gain, 20 fps, 5 min
Neptune: 50ms shutter, 500 gain, 20 fps, 5 min
I tried Mercury and Venus recently, for Mercury I captured over a quarter of a million frames over 10 minutes at 425 fps, Venus 230 fps, but didn't capture any details on either one.
Excellent job, keep up the good work!