So I ended up with this. Had a few interesting accidents (my S2 frames weren't centred and O3 was a disaster with reflections), but salvaged something. Kind of happy with the weird colour. Still aiming to do some regular RGB but the skies aren't obliging. Ended up with roughly 10.5 hours of combined Ha, O3 and S2 using an ASI1600MM-Pro, my ED80 and a HEQ5 Pro. Processed in Pixinsight as a SHO image but with the green removed.
Astrobin:
https://www.astrobin.com/379512/