RE: 4*40 Tail wheel ?
Or you can be inventive. Get a sullivan tail wheel I believe I swaped out the tail wheel wire for a 3/16 wire. Added a collar and a small piece of brass strip a matching pair of rudder, elev. etc. etc control horns and a small strip of 1/64 ply for reinforcement between the control horn and the rudder. a couple small springs to keep the shock from bumps getting to the servo. My first attempt at uploading photo's hope they show up. made an ooooops That was a dubro .60 tailwheel bracket..
Egor