I have redone this image and spent quite a bit more time getting the alignment correct or at least a bit better.
Calibration and alignment carried out with CCDStack V2. I've never really spent much time with this application and decided this image would be the trial effort.
The final image has come up OK but next time I will image with longer subs than 120 seconds. The image has been cropped to center the core a bit better.
Hi Res Version:
http://www.darkskyau.com/cm/displayi...254&fullsize=1
Thanks for looking.