That is a excellent result Mike!
It does certainly pay to spend a good hour or more on a image..
Nice and sharp as well and low noise!
Only thing I can see is that the image is just a tad red.
I have adjusted the levels to get the background a more neutral color and slightly lightened it also till the background RGB values are in the mid 20`s. Maybe that is too light for some but I find DSO`s look nicer when the background isn`t too dark. My personal tastes
Keep at it!
you have come far very quick.
cheers Gary