Managed to get PI working again, watched a few tutorials and had another play around. Got closer with the colour calibration but still not quite there. The background has a bit of a green overtone that I really struggled getting rid of. I know it should be more yellow than it is but messing around more just made things worse.
There is some visible chromatic aberration on some stars, not much I can do about that. The Nikon 24-120 lens is amazing, just not amazing enough
