Doug,
Fabulous effort, there. Pushing the DSLR to the limit, eh! Go on, buy a full frame CCD!
You're going to hate this, as it's something I've been identifying in a few of your images, but, I think you have a colour cast over your image, again. Sorry! It's most noticeable in the star field surrounding the nebulae, it appears as a magenta or red. Could this be the hydrogen alpha portion of the blend? I'd have expected the stars to be a bit golder, that's all.
Otherwise, you're cookin' with gas. And, then some!
More, please.
H