Many people have commented in the past that there was something wrong with my images. It seems I was not stretching correctly. The dark bits were too dark.
I used PixInsight to stretch this data. Two panels of the Lagoon and Trifid.
Full res image here 15MB
http://d1355990.i49.quadrahosting.co.../LT_M_PI_L.jpg
Smaller with labels 7MB
http://d1355990.i49.quadrahosting.co..._03/259483.jpg
I am sure the improvement is obvious. Just goes to show we are never good enough. Always more to learn, so little time to do it in!
Bert