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I dont know if I have said it around here before but this works for me.
To polar align I take a time exposure thru the guide scope of the day (can be the 70, 80 or either of the 150 ar or sn ) with the motors off and the scope pointing to the pole (home poss), check the image and move the mount to try and centre the circle of stars recorded in in the shot.. often I cant do better when I check it against drift (it takes a couple of shots but only while the coffee is brewing)
alex
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