Hi Lavellotron,

re:
> If not, what are the main differences if I wanted to burn the time to rebuild and make it work?

You'd do a diff between the default v3 moi.css and the modified version, and then apply the same changes onto the moi v4 moi.css file.

You can't just copy the entire v3 UI onto v4 because then you'll be missing the changes in moi v4.

- Michael