That's a very pretty and wonderfully colourful gem that Tim with lots of detail, nicely done.
A minor thing, it appears that you may have used Russel Cromans Star Shrink..? It's a personal thing I guess but I don't like what it does to stars if you are not very careful. It can tighten up the cores of stars alright but leave diffuse halos around them which to me looks odd and gives the image an obvious processed look.
What a scope BTW
Mike