Well done Peter,
Try rotating your camera until the drift of Jupiter in RA, when you turn off your drive, is parallel with the long axis of the frame. Then you only have to worry about corrections in RA to keep Jupiter centered.
You will find that with this orientation the belts on Jupiter will be slightly tilted relative to the frame. As the major moons orbit more or less in the plane of the equator, you will be able to image them much further from the planet than is the case in these images.
Cheers
Trevor
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