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Hi Paul,
It is probably best to point at the meridian and then let PhD choose a star. It appears to do this pretty well. Use darks and make sure you are in focus before doing calibration. I have been finding longer subs are giving me much better guiding due to crap seeing. (4sec).
Once you have calibrated run guide assistant for a few minutes and check the backlash with this as well. Apply the suggestions and see how the guiding goes.
Mike
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