Didn't have great star data but attempted to add some coloured stars. The bigger yellow ones seemed to work but not a lot of blue. I'm thinking the Ha star profiles were just a bit small, despite reducing and saturating the LRGB stars somewhat. Keen to hear of other tips here. I used a NB star mask and blended the a and b channels of the LRGB stars with the a and b channels of the SHO image (Rick Stevenson put me onto this). Not really too desperate to have heaps of star colour given what is around it, but would be nice to have better PI tactics to get it working better. Anyway here is something of a last iteration of this:
https://www.astrobin.com/416777/D/?nc=user