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When drifting do not worry about left right movement.
Make sure you have a star in the East or West then face the north where the maridian meets the celestial equator (perth = 56 deg elevation from the horizon use starry nights or some thing like that to tell you)
once you can keep a star on each one for 2 - 3 min your ready to image with guiding. without guiding you need the star to stay in the same spot for 2 x the exposure length aka. 5 min exposure would mean a 10 min without drift.
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