Just finished processing this image, used registax 5 this time.
I'm quite pleased with the detail in the tail close to the comet considering was'nt the best seeing.
8" astrograph - Heq Pro 5 mount - baader coma corractor - unmodded canon 1100D - cooler box.
6 x 8 minute subs - ISO 800.
Stacked in DSS median - stars and comets - processed in PS7.
Cropped image.