Hey Dave
Thanks so much! In terms of processing, I use DSS to stack the subs and then use photoshop for the rest. I've heard a lot of good things about Pixinsight but I'm gonna try and learn photoshop well before I go to the more complex stuff.
I've just made my astrobin account, so here's the link to a bit of a higher-res version:
https://www.astrobin.com/dt8h78/