You need th PM Paul Haese! He'll definitely help you.
From my limited experience, I needed to set up my equipment differently to image a planet and then the associated moon. Then layer them in together afterwards. Perhaps there is another trick to do it in the one instance, however, as their associated surface brightnesses are very different, I cannot see how to do this another way.
PM Paul for expert advice. Or go to his website, just Google him.
PS: your Saturn image is very good.
Steve
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