Well I have been pretty lazy of late finishing off this picture but tomorrow I am sending this off to get printed as a 10x20" metal print while there is a special on at Print2Metal.
During the down sizing it does seem to have made it look a bit more speckled (smaller stars appearing brighter) so I do want to see if I can mitigate that a bit more as it looks a little spotty. If not, I'll just send it as it is.
Just wanted to give a global thanks to everyone for their constructive criticism and processing advice