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I use a eq6 with a highly modified vc200l. I am doing ok with tracking, but I am cheating with an AO8. I dont know what cam you are using, but adaptive optics are to me at least worth their weight in gold knowing that every exposure is going to be perfect.
I know leinad on this forum with a eq6, vc, qhy8 combo after using pempro for pe correction, is taking 15 minute exposures at 1800mm.
Note, that the gpd2 is a LOT smaller mount.
Brett
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