He guys.. I cant even begin to describe the trauma getting this has caused me! Issue apon issue... I ended up manually stacking 50 of my light frames and 15 of my darks in photoshop... no i havent slept. They were unguided 30sec iso1600 subs on a fairly cold night, Im sure you can do the math but its 25 mins of exposure out the 90 frames (45mins) that I could have stacked (but got to tired). Please let me know what you think