[JohnH]

I had another run with the camera and Guidemaster - my polar alignment was poor - carry/plonk method - however the software coped well and I was happy to see there was no detectable field rotation in 3 and 5 min exposures. The attached is M20 again at 50% of full scale. I am please with the tightness and roundness of the stars - I had the guide exposure up at 5s so the mount was behaving itself too. I estimate the errors were mostly +-1"