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well i knew you were experienced so i spose 7.75 is possible.
the engineering in Dave's Dodgy Dobs means that sometimes the guiding will stick and a small shudder can run thru the optics.
i am trying to track that crud down. i have triied cleaning the televue (scary) and a few goes at cleaning the ccd. I will rotate the powermate tonight and see if the spot has rotated with it?
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