I cobbled together 18x16min and 5x32min of HA plus 5x64min of NII. Just averaged the frames weighted by exposure no rejection at all to produce a 32 bit stacked image.
Used HDRMT in PI and HDR reveal in StarTools to show the very bright detail.
Cropped image 1.5x1.5 degrees. 2.5 MB
http://d1355990.i49.quadrahosting.co...N_HA+NII_n.jpg
Inverted 2.5 MB
http://d1355990.i49.quadrahosting.co...HN_HA+NII_.jpg
There seems to be a faint halo all around that may come out better with many more long exposures.
Bert