I wanted to stack 10 different objects that night so I really couldn't spend that much time on each one. I was pleasantly surprised that this M42 turned out though. My secondary completely fogged up after the 9th image so that is where I stopped.
With some decent skies, good transparency, and a little more time I might be able to finally get a decent image.
The AT8IN was used on the CG-5 unguided with an unmodified camera. 9 minutes of sky time.