Thanks Graeme for you comments. I think repeatabilty of results is the main thing. Part of that is the mount and part of that is the optical system. Using an OAG has made a huge difference. I went from throwing out the odd sub to not having to through out any at all. So every sub now is used. The mount provides that night after night pointing accuracy and that means collecting more data all the time rather than finding the same spot I was on last time.
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