Yeah the RGB data is not as important as the ha or L data so a one shot with this camera would work wonders.
Thought so re your skies
i've got about 3hrs or so on M83 so far and my data looks like rubbish compared to yours
But i'm in Perth suburbs so ...
Hoping to add some 500D data this coming w/e to add to it.
You never know after a few weeks i might get something resembling yours, but i doubt it. Doing 20min subs to pull more data out as we speak.