[JohnH]

Some more tweaks and twiddles to the GM settings yielded the attached tracking log...I am happy with it but wonder if there is room for more improvement. The offest in DEC is deliberate - I let the error build to 1" and correct from there - it prevents crossing the 0 line and introducing to possibility of backlash.

The amount of drift in this run was high as my polar alignment was off (I used Alignmaster instead of the drift method and was not greatly impressed) so I think I can get a better result with less drift - my images showed round near the guide star but also significant field rotation see attached m8 shot...very rough processing I am afraid - mismatched darks and flats - cloudy night etc but the purpose was only to gauge tracking - the guide star was one of the embeded NGC6530 cluster members...