Bit of a bump, but what an awesome mod. One thing I might note about the Milky Way image used in this mod; there are at least two bright "stars" in that image that are not "stars"; the large yellow-spiked star, and the bright spot right next to the MW center. At least one of these is actually Jupiter, according to the original source: http://www.eso.org/public/usa/images/eso0932a/
I believe there's a comet in there as well. Might be a fairly quick touchup to try and remove those.
Another interesting feature to add might be the zodiacal light; at the darkness levels where you can see the Milky Way in its full glory, the zodiacal light will be visible as well.
-Fellow astronomer