TRP,

I have used that GP tail wheel setup several times and it works fine. Just make sure that you mount the rudder control horn so that one screw goes on each side of the tail wheel wire. The only down-side to it is that if you do have an accident where the tail wheel impacts the ground too hard, it can break the rudder and/or the nylon bushing that holds it in place. And once the rudder is installed, there's no way to replace it. So IF that happens, you're almost forced to replace it with an external type. But as I said, I have, and still do use them.