If you are keying in on “precise” then you might reconsider......... The 4D is a specialty airplane for training certain 3D maneuvers. Are you wanting “pattern precise” or a 3D trainer that you can safely learn some of the 3D maneuvers”. I could not do 4 point rolls or Knife-edge with mine. But, I can easily do them with my “balsa” Venus. I can’t really hover or “waterfall” my Venus, but I could easily do them with my 4D etc.