I got 15 x 10minute subs tonight with phd on a second PC and I still see drift here, so my usb blocking concept is shot down in flames. In almost 2.5 hours it has moved 23 pixels right and 51 pixels up at 1623mm FL, yet the phd log says the guide star hasn't moved at all. It's guiding at around 350mm. It not a problem but I'd like to know why it is so?
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