Thanks Alan
I can notice movement after each exposure ATM as the Comet is moving quite quickly.
Glen, the exposure above is a single 300 second shot with an 8300 CCD, a 102mm refractor working at 610mm, if you blow it up you can see slight elongation in the core. I have another set of 5 X 50 second exposures I have yet to process so I will see how that pans out. The above shot was taken mainly to Invert and get some detail of the tail. I tracked on the stars, if you use PHD2 I believe you can track on the Comet itself. Hope that helps a little.
Cheers