Until such time as I can provide a more suitable answer, you can just let me know what tweak(s) you'd like made and I can do my best to integrate those into the official distribution.

Cheers

Actually, I have the SDK installed as a git submodule and that seems to work fairly cleanly. At some stage soon I might hack the relative paths to the .xcconfig, Info.plist and friends (probably 30 seconds after I discover how broken symbolic links are on Windows) but for now it's hanging together.