Hi Duncan
It's hard to critique imgaes at that size, it is full of jpeg artifacts and is way to small to see anything well. You need to get on to a web site like PBase or Flicker et al where you can display your images at a much larger size.
Having said that it looks like a nice image, the stars appear pretty round and the colours are ok, some will say it's a bit to blue but I like blue, it is the nicest of the colours to cast over a deep sky object IMO.
Mike
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