Thanks gents!
This is the first image with the ASI183 that I'm really happy with. Yes, there is room for improvement - there always is.
David - yes, there are horizontal bands, although I did my best to hide them. When I stacked the data in SiriL, they were most visible in the red channel. The Affinity Photo stacking routine did a much better job of removing them, but they were still present. We'll see how last night's data of M42 goes.
Cheers,
V