Moved this thread to the Game Help board.
I do believe editin' the models in minor details is okay. I quote from Ms. Allegra (when I've mentioned a situation similar to this earlier to her some days ago),
(http://i.gyazo.com/02e3d9d220febae1ebcb9f00cd9445ba.png)
However, I would personally double-check with Red before doin' anythin' officially.