so how do you take off the undertail on an f4i. i just bought a sweet undertail but idk how to take off the stock one. also how do you move the lock location cuz there is a hole on my undertail but idk hot to take the lock out of the stock license plate holder thing. PLEASE HELP ME

the stock undertail is not removed , you have to cut the fender part off. there are tutorials on here in detail with pictures as to how its done. it does take some time though.