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I've always had good results training PEC using an illuminated eyepiece and with my ST7.
Given the choice, I'd use the ST7 over the eyepiece any day, it just has to be that much more accurate. But I found training it manually using the eyepiece produced significantly corrected PEC anyhow.
The Gemini has the ability to do useful stuff like time-offset the PEC corrections (to comphensate for user delay to make the moves more than just reactive), and smooth the data. Does the starbook have useful things like that?
Roger.
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