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How interesting.
See attached.
There certainly is drift in the direction which would suggest slippage. SLow over time except recently which perhaps correlates to after my camera/focuser was yanked out of place by a cable snag.
I can't explain the regular spikes on a monthly basis recently.
I think indications are I have not had it tightened as much recently, it seems it has been slipping more.
Note: The all-time graphs pans many periods of focus calibration and different focal reducers so only sub-sections of it should be considered in their own right.
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