Ok, first of all, fixed the linking so that the main source file is again being updated, yay!
I'm thinking to use the same github for the new project, just make a new folder for the new main source file and plow straight ahead. Seems the easiest way by far to keep everything up to date.
Also, appearance. We could cheat and use the same appearance hooks that Flexible Survival uses. It means you could even, potentially, use existing extensions to grab mutant strains.