Andy, superbly done. You've pretty much gotten on top of whatever it was that was causing the mysterious "broad watercolour brush" effect, and you're showing good subtle detail for example in the "feathers" under the wings, and in that beautiful OIII bubble at bottom right.
You've taken enough SII to get a good clean image.
Your stars have worked out very nicely. I'm somewhat of the view that in a narrowband image, the star colours are irrelevant, and for artistic reasons it is perfectly legitimate to just desaturate the stars to white.
I statistically measured the contribution of OIII in your image. Possibly you could make the OIII a little stronger. There's plenty of it, but perhaps you've played it down.
Interesting to compare your shot with one by
J Mattei. Both are very good.
Best,
Mike