Nice going chris. There may be some more detail and better contrast to get out of this one, but the best thing would be some more subs. I was out at ten chain hill on Saturday night (in the freezing wind) and managed to get this image of M31:
Link here
It was 17 x 5min subs. I didn't take any flats as i fell asleep at the scope! But I did subtract some library darks from similar sensor temps.
Cheers Adam