Well, unless you can park the boat so the sterns are sitting over a large drop, you have to lift the boat and put the rudders in from the bottom. Last time I borrowed a pair it took three of us to remove them - two lifting the boat and one trying to push the blades out. Mind you, the T blades were a tighter fit than my own rudders. The other two Stealths up here keep their rudders in the stocks all the time because it's too much hassle taking them out.