I had one of those in 1968 when I was at Langly AFB. The only thing different about mine was that I put a J Roberts system in it and flew the wheels off it doing touch and goes and other foolish things. I used to loop , in/out and fly inverted and wing overs but not much more so I can't say how good it is. However,mine gave me a lot of enjoyment. I left it there, wonder who got it.
Dennis