Hi Paul - I'm using a QSI 683 wsg - cooled to -10C. LRGB 33x300 seconds each. 10" GSO truss RCT on a Paramount MX, TPoint/ProTrack but with autoguiding every 10 seconds. Oh yes and using a different version of SGP each night. At one point, I had more iterations of SGP than I had clear nights. No wonder Ken was reaching the end of his tether 
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