ha, thanks fellas. That version has some badly calibrated flats, actually. I forgot to apply bias frames and it's heavily overcorrected which I had to try and salvage in PS. The centre of the frame is a bit of a mess, but it's being fixed now.
I'll post up a better version in the Deep Space section when I can edit it properly.
And finally, (and again) Happy New Year everyone!!
A few more hours to go.