We now have a total of 13 hrs Lum (in 1hr subs) plus 11 hrs each RGB (in 30 min subs).
The new beastie is here.
We offset the new data by a couple minutes of arc so that artifacts would not line up. Seems to have helped.
We hoped that the extra colour data might make the colour of the main galaxy more definite. Almost nothing happened. Main thing that happened with the extra data is the background is less gritty, with less artifact, and there are more faint fuzzies visible.
In processing, we fixed the green gradient that Greg noticed. That removal of the green gradient produced the expected very slight change in the colour of the galaxy.
Cheated a
tiny bit and did some local brightening round the little face-on spiral that's at about 2 o'clock from the main one.
Overall, we're pleased to have put in the extra work. Thanks to everyone for the suggestions.
Best,
Mike and Trish