Thanks for the comments everyone. I am using a OSC with no UV/IR filter so there WILL be some IR bloat around the redder stars. I’ll have a go at restacking only the best subs but from memory this only has 40 minutes of data as it is.
I’ll check out the individual colour channels after debayering and see if checking the blue channel makes a difference.
Might also go back through some archival stuff around, Hubble can be a good reference point
