I've subsequently applied a camera rotation and gone 3x deeper to get a faint fuzzy in the field. Have to say given the 2500mm odd focal length, I'm really happy with the tight stellar profiles.
Sadly the sky flats are a little off due high cloud preceding a cold front running
up the east cost.
New! Improved Version! here. (same url as before) but sorry still no colour...maybe like Amazon delivery...one day it might happen