I have test flown both the Enforcer and Force One from Balsa USA. They are pusher prop delta wings. Both flew excellent. However, I can certainly see orientation being a bit of a problem. Also, pusher props can be a pain in the neck with fuel flow problems. I'd keep away from the Diamond Dust. I think it's an awesome plane. But it is not a second airplane. It can be super fast. It is not a simple plane to build either. I like the idea of the 4 Star Forty or Venture 60. Even a Super Sportster 40 or 60.