Thanks to all for the nice comments.
Will, you are correct. The red piece on the right side is one of my U/Tronics Single Channel units. The black block behind the muffler is the servo.
Randy, The differences are: 1/32 plywood wing skins, wing and tail held on with rubber bands. 40 ounces total weight and powered with a Blue Bird 25 RC engine. See Build thread under "Ringmaster Trainer started" last post was Mar. 19, 2009.