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If you Google PHD and Drift Aligning, you will find lots of better methods that are quicker and more accurate.
I use the PHD graphs and can make iterative changes every 10-30 secs in the first instance, out to every minute as I get closer. The graph gives you intra-pixel view of movement of stars through your guide camera.
You don't even need to know North from South, just follow the red line.
On a clear night I can be drift aligned within 20 minutes from a standing start.
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