I surely did use your ColorMask script Rick Stevenson! Love it!! And it is featured in Inside PixInsight with creds to you sir! When you revise it, add 'red', etc. to the name of the masks? Thanks for this valuable resource. Try it folks- not just for narrowband.
Looks pretty good Warren. The palette for NB processing can be quite varied. I did this object in the last year and loved the way the palette can be manipulated to produce a 3D look. If anything I reckon it needs some of the blue cast in the back ground removed. Other than that it is an interesting looking image.