DIY: Golf tee mod / exhaust flapper disable w/ pictures

[illogic]

Has there been any confirmation that there's a possibility the mod can't be reversed in the sense that the hose is re-connected/unkinked and the exhaust flap still stays open? I was going to do the mod yesterday when I realized that my exhaust flap is always open. My car was previous leased before I bought it so I wouldn't be surprised if the previous owner did the mod and later reversed it.