When I am going to use my SSAG to drift align I generally use PHD. Just calibrate it on a star at the meridian, in the options turn off guiding and then watch the declination in the graph.
If it drifts either way make adjustments to azimuth. Do the same for a star low to the east or west and adjust the altitude. This way if you are pretty far off you will see instantly and can correct and you wont have to wait for the exposure to end.
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