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I've used the 2 minute exposure to show rotation via the 1200D to pinpoint the SCP except now I've found using Sharpcap I have some cone error to get rid of.
I haven't got East or West horizons so the 90* 2 images method has got me to less than 2 minutes of arc from aligned. Now I've just got to get rid of some clouds so I can fix the cone error.
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