Annoying scattered cloud tonight - moving fast and frequent enough to make the autoguider have fits. So, in the end, only ONE 5 minute sub of M42 was worth keeping.
I had Canon long exposure noise reduction on, but also ran it through DSS with flats and darks (master files of same ISO I had).
Turned out O.....K..... needs a LOT more data.
Not too shabby for a 5" apo refractor taken from inner suburbia with more streetlights than needed (seriously, 5 streetlights for a quiet suburban area???)
GOOD quality png:
http://img21.imageshack.us/img21/1320/m424nov12.png
So-so jpeg: