As I was looking for full scale pics of tri gear J-3's I was reminded that I did the same thing many years ago. We have a paved flying site that is unkind to small taildraggers in rookie hands. The model was an EZ Super Cub 25 ARF that I put a nose wheel on and used stamped aluminum gear for the mains. Sort of a long wing Tri Pacer. Still looks wrong, but worked good as I remember.