Sounds a little "gimmickie" Also lets say you're 120 yds out and the last shot was from 80. Do we wait for you to change faces ? And what if you lost your tool. I've also encountered the loose screw phenomenom. This is with a T.M. driver where one or more of the weighting screws has loosened and it sounds like.........you have a screw loose. Good luck selling this one, maybe if they offer a free bowl of soup.
Well, this wouldn't really be an issue to be honest. You are not changing the loft of the club, just the face plate so if you use the same club from 120 as you did 80, you wouldn't be changing anything unless you feel you need a new face plate to minimize wear?! :)
The rest is true though, doesn't sound like a winner to me.