Hi Geof
You have certainly tamed the noise and without imparting too much of a plastic look either so that's good, it's also quite deep but I'm not too sure about the purple hue in the outer dust envelope though..? To me this is giving the image a narrow band image feel as opposed to a natural RGB look. Even with the purple (after all, that's right, look at narrow band images
) it is still a great shot regardless
Mike