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Don't be sorry Matt. I appreciate you sharing your experiences. I'm considering getting one of these focusers, precisely to avoid the sort of problems you are talking about. My rack&pinion is sags and flexes too much with heavy eyepieces. The Crayford on my ED80 is very basic but solid, and with the tension on, it does not shift even with heavy eyepieces or SLR cameras hanging off it.
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