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First question is WHY?
1) If you are doing visual observing then the Gemini can compensate for your misalignment.
2) If you are doing astro-photography a polar scope doesnt cut it anyway and you really need to drift-align.
I just plonk my G11 down, point it roughly south with compass, set it roughly to my latitude 33deg, then start drifting.
We fitted an EQ3 polar scope to our G-11 (required some custom machining of the polar scope) and have never used it, not even taken the cover off.
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