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Hi Leon,
Have been using the G11 for imaging, and whenever an exposure is about to be taken, I would increase the tightening pressure on both RA and DEC clutches. During drift alignment process, they would normally be a little "looser". When it is not used, I would loosen the clutches generously. Mount has been fine all this while for the past eight years. No slippage. After upgrading the worm to the high precision one, it works even better.
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