M31 FirstProcess

This is my first past at a post edit. I used a short post edit procedure I use when I am first checking out how things turned out. There is more detail to be had here.
Not bad though considering the clouds were rolling in.
81 images, 40 rejections in registration. I previously seen dec drift in something I did, but I didn't in this. The time I seen the drift was with a light lens on a ball head and no balancing performed.

Modified T3i
Sigma 150-600mm
59 second exposure with 3 second delay between shots
Focal length 252
Aperture 6.3