g'day marc,
hmmm, I think from memory; its the same as any planetary? make sure the alignpoints cover the circumference and cross your fingers. I would max up the 'working area' box (I can't recall the heading) in the tools too (not sure if its needed or not at this early stage but may as well). I often will need to crop when I have a zoomed region due to errors at the edge of frame but a disc I think you should be fairly ok.
russ
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