Looking the goods mate!
Don't go too silly wasting good time capturing epic amounts of RGB data.. get "enough" and make the lum (or Ha in this case) do all the work...
So far the longest RGB data I've captured for any target with the ST8300 is 4x5min.. for the majority I've stuck with 3x5min.. I get them out of the way when the target is about 45° above the horizon, once I've got the 45 mins of colour, I focus it up as good as possible through lum and let it run 5 min subs untill the meridian, do a flip and do 5 min subs all the way down to 45° in the west...
Lum/Ha is life.. colour is pretty, thats about it..