See attached stretched images of M16. I understand the high rejection seems to have done its job, contrails gone etc. But the low rejection data seems to include information that would be valuable for the light frames. I took this with a ZWO183MC and used BPP in PI with standard settings.
How to I tweak the settings so this data isn't rejected. It seems that some of the baby is being thrown out with the bathwater!
Thanks again for all of your help.