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Thanks for the link Alistair and it does clarify a few things for me.
Gary suggests that we should align our telescopes to the refracted pole and not the true pole and the fixed sidereal rate of the RA motor will be close enough.
I wonder if by performing an accurate drift alignment we are in fact aligning with the refracted pole as opposed to polar aligning with the 2 star setup recently introduced in Synscan V3.35. Otherwise how do you find the refracted pole?
Anyway it appears that the error is minimal and only on a sub-pixel level on 15 - 30 minutes subs.
Regards
Bill
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