That looks pretty good Frank.
nice round stars and plenty of detail in the nebula.
There was an analysis of the correct RGB colours for the dumbell a few years ago and the conclusion was that the blue in the middle should be more of a teal green but your image looks great anyway
I believe there is a jet of material eminating from the central star in the dumbell, it comes almost straight out of the image in one direction and protrudes out the back in the other direction, can you see it? If not have a look at Richard Crisps Ha + OIII version in the sepearate post I've made to this forum.
Mike