This morning instead of working on the mosaic version of my M16 data, I played around and created this from the core instead.
Eagle eyed observers will note the image contains some sharp lines from the sub overlaps.
Astrobin with larger version and details:
http://astrob.in/202615/0/
Although I was just messing around, it did allow me to try a few more things in PixInsight, and I'm happy with the detail that appeared on this attempt.
Any feedback or comments welcome.