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I have just had my Celestron AVX mount back from Dark Frame Optics (DFO) after a hypertune. Has anyone else had their AVX mount tuned by DFO and would be happy to share their data? I have a C8, 6.3 focal reducer with DSLR camera on the back so I would be keen to know what the maximum exposure time I can expect for both unguided and guided with my set up? I have seen conflicting answers from various sources. I don't think 10 minutes unguided is possible with a C8, maybe with a lighter OTA or DSLR with lens attached. Thank you