Ok, I'm pretty happy with this rough 1st stitch and process.
I'm sure one of the pros could get more from this data.
details:
GSO 12" F5 Newt @ FL 1524mm
DSI II Mono with peltier cooling to 10C. Ambient 16C
Homemade/ Bartelised GEM with homemade RA/DEC worm gears.
No PEC turned on.
Turn the lights out and stand 10ft from your monitor
Steve