Hi Daryl,
Looks good to me! Plenty of detail in the gas & dust clouds, and none of stars or core area is over exposed - well done to achieve this.
As for colours, they're all subjective and depend on what palette you process with, and how you process the image data. In other words, don't stress over it - so long as you have an image you're happy with then it's a good one.
Cheers,
V
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