Here's an image of Saturn from this morning in reasonable seeing.
I've experimented with merging multiple images in WinJupos using the derotation, this result is quite good but you can still see a few artifacts around, especially in the rings, where the merging and derotation doesn't work quite correctly.
Overall it works quite well, and has brought up some nice detail.
Nice image Bird, I find Saturn quite tricky to do a perfect image measurement. It seems like a lot of trial and error to get the outline close. At least with Jupiter it's done automatic for you .
In this case I was lucky enough to have two moons in the frame, makes things much easier!
Sadly the derotation code in winjupos doesn't handle or correct the moons, so I ended up with multiple moon images in the result, so I removed them from the image above.