I used to have one of these. I modified an old Tower Hobbies Uproar 40. Put a second gear on the top, just opposite the main gear. Had to be a little taller than the main to allow clearance for the fin. The hard part is the tail wheel. I added another to the top of the fin, attached to the rudder for control. I was concerned about the strength of the fin, so I added a couple of "tail wires" between the top of the fin and the end of the stab. Worked pretty well. If I had it to do over again, I would probably just put a skid wire on the top and forget the tail wheel. I played with it a few times, but did not keep it very long. Sold it at a swap meet and have not seen it since. Unfortunately, I do not have a picture of it.

Mike