This is my first attempt at M45 and considering the subs I'm surprised by the result, it's not perfect by any means and I did get sidetracked creating a spike tool whilst processing but it's better than I thought. I'm not sure how much more could come out of it as it is the processing which I find the hardest so if anyone wants to have a play just ask and I can put the original stacked .TIF in dropbox or something.
There are 36 minutes of 30 second subs at ISO800, f5.6 and about the same number of darks.
Any comments and advice is more than welcome as I'd love to improve it if I can.