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Hi James
reading through the good advice in these posts, found myself thinking CGEM925 would be a good choice. then got to Grant's post - totally agree - good for visual and planetary, OK for DSOs with a camera with large pixels or binning.
Suggest you put a steel pier on a concrete base and only consider concrete filling if it is not stable enough. I use a jarrah post, which is a lot floppier than steel, but it works fine with a similar weight setup. Regards Ray
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