I took a Hanger 9 J3 ARF and made it convertable from convential gear to tri gear. I made the nose wheel steerable on the model.

On the full size the main gear is simply turned around and the same mounting is used on the fuselage. The nose wheel on the full size is not steerable. There is a unit hanging up on the wall at Lock Haven in the Piper museum. The tail wheel remains on the plane. With only the rear seat occupied the plane sits down on the tail wheel.

I own a fullsize J3, but it is not tri geared and if it had been I would have removed it.