Also, as a side suggestion, maybe add some models for the named galaxies such as Circinus?
I'm working on severals others galaxies models, but they won't be used for procedural generation. Also you can see this thread or try to do your own galaxy if you have paints skills :), the process is not that hard.
I did see the modding thread and the 8 galaxy models thread, however at least two of those (AM0644 and Arp 273 are already in SE, so I don't now how that would affect things. For making my own, ah, I don't know, would Paint.NET do?
So, are you going to add some new galaxy models for procedural galaxies until the procedural model generation gets set up?
I have also suggested to implement the possibility to add many differents customs galaxies (like for nebulaes) in the hubble's model file until the release of procedural galaxies, it would be ephemeral but enjoyable, especialy for long time users.
Yeah, there are only 5 models used for the procedural galaxies and having some variety wouldn't hurt.