Getting rid of gradients is so much better and easier with Pixinxight's DBE module. It is essential with RGB and OIII. Quite helpful with NII SII and HA.
Here is NGC 6164 and surrounds in NB Hubble Palette 8MB
http://d1355990.i49.quadrahosting.co...6164_NB_HP.jpg
This is a blend of RGB and NB. NII and SII to red and OIII to green and blue. 8MB
http://d1355990.i49.quadrahosting.co...64_NB+RGB_.jpg
Here is a map from Astrometry.net 3MB
http://d1355990.i49.quadrahosting.co..._03/247839.jpg
The RGB data is only 4 min subs. With 8 min subs the dust would have more detail in the dim bits. I will try to collect this dodging the clouds and Moon!
Bert