I had some trouble getting DSS to stack this. Using comet stacking, the background came out all mottled. So I took the stacked comet image and layered it on top of the stacked star image that has a good background. I think the comet was about mag 9.5 at the time. Happy to get a bit of a tail.
Full res:
http://www.astrobin.com/full/92345/0/