Two sets of data taken back to back.  First set was with 30 sec, high-gain sub-images and the 2nd set was with 60 sec subs at medium gain.   Total time was 3.65 hours.   Cropped about 50% out to isolate the galaxy.  The 60 sec subs were better, but only because I had centered the target better and it was higher in the sky when I started the set.