Thanks again for your comments and help.
Here are 2 images from last night, I haven't added any colour saturation during processing and in many cases went to minus saturation. Kept brightness up (Robert=thanks)
The first has waveletts 6=75 5=50 4=20
the second 6=70 5=36 4=13 3=5
In both cases stacked 300 images from 600 = captured for 120 seconds.