This is good Doug. While not a huge amount of data, its enough to work with and would deliver such a result. I can see what Mike is indicating. You can play around for some time trying to get the right Ha blend to ensure you haven't lost the subtle blue/pink hues of the region. Personally, I find it easier to create a DDP stretch straight RGB, blended as colour in PS. Mask it so you can keep the Ha definition, but restore the subtle colour hues of the area. Keep an eye on the noise with the DDP stretch. You'll want to stretch it reasonably hard and give it some colour saturation to boot. There's not many functions that I use the paint brush in astro images (for ethical reasons), but this is one of them. If you want to push it to the next level, you can use a similar process, but process the layer to manage star colours. Plenty of options. Keep at it.
