The answer to this is probably no, but neither the wiki, myself or anyone I've spoken to have been able to deny or confirm this... but I was wondering.
Say you have a UV on a weapon that isn't 5 star, if you were to upgrade it would it be possible to gain a second or maybe even a third UV through crafting?
I know you can get 1, 2 or 3 UVs from crafting, and you can add extra UVs with Punch, but I have no idea if it's possible to gain any more from crafting.
If you can, the chances are probably extreme rare, but is anyone able to confirm or deny this?