Hi Mark, I have posted my thoughts on calibration etc on your question post
http://www.iceinspace.com.au/forum/s...ad.php?t=44268.
As for this image. Very nice except for a few imperfections and a bit of noise. None of these are unable to be fixed. The real outcome for this image is that it is finished. Appart from a few processing tricks you will really need to start a new image to fully calibrate and you will notice the huge difference.
Keep at it.
I hope you don't mind but I have included a copy of your image that I had a quick play with. Some selective sharpening, Background masking and a bit of DDP stretching.
Probably a bit much but it will give you an idea of what can be done.