I put a tailwheel on my LT-40 during the reconstruction after I crashed it.

I reinforced the area at the very end of the fuse where the tailwheel is to be mounted. I made the steering horn go on the opposite side of the rudder control horn. I silver soldered a small piece of threaded rod to the steering horn and screwed on a ball link to the end of it. Then I fished through some nyrod to the rudder servo on the opposite arm of the rudder nyrod. The tailwheel nyrod had to exit the fuse underneath the horizontal stab.

I don't have any close up pictures of my setup, but I'll post the pics that I have. You can see the yellow nyron on the right side under the H Stab.

Juice