While being on the rudder I installed the tail wheel.
This is a Japanese aftermarket one imported in Europe by Ralph Schweizer.
You have to drill a 7mm hole for the tail wheel axle, and then a 4 mm hole in the rudder.
Two drops of CA after thread, and just screw in the small plastic part.
The tail wheel is held in position by 2 small screws.
With the tail wheel installed, it looks like more to a plane now.