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Old 03-10-2012, 08:26 PM
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Marke (Mark)
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Join Date: Nov 2009
Location: Sydney
Posts: 1,193
Just a wild guess but what about orthogonality ie is the tube perfectly aligned with the mount axis . This is one cause for good pointing untill you do a meridian flip . It can be fixed by shimming the OTA a little to get it closer to axis .
Just a thought .
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