Great image for poor integration (117' understood?)
Try to make bright stars smaller, in first version do not have halo around
I suggest to try Iris software for stacking and preprocessing, I had a great surplus with it, with DSS my raw (60D) are unusable
Looks this M45 image,
before
http://www.astrobin.com/1964/0/
and then...
http://www.astrobin.com/1964/B/
thanks for share, anyway!
clear skies
Elio