Thanks Carl and Mike. These were actually uncal'd subs I couldn't help throwing together quickly for a peek, then I started spending more time on it than I should once I got hooked
I'll go back to scratch with darks and flats then have another go. Thanks re colour comment Mike. I'm only just starting to have any success pulling out star and faint neb/galaxy colours, so I really only know enough to be dangerous. I must collect some decent G2V data through the IDAS and from dark skies too in hindsight to give me a better starting point.