Image specs: LRGB, Ha, O3: 30 X 300s each filter.
Pixinsight:
WBP, Automatic Background Extraction, EZ noise removal, Histogram Transformation, LRGB combination, NBRGB script (add Ha & O3), Curves Transformation (saturation only).
EZ Deconvolution (introduced some small rings around stars).
Photoshop:
Manually removed the artefacts (rings, about some stars) using a mask and then blur and smudge tools.
A minor adjustment to lightness, saturation and colour balance.
https://www.astrobin.com/full/ryf3gd/C/?mod=&real=
Thanks for looking, help appreciated