I have version 1 with some minor lightening mods and a Hyde -mounted YS 91 FZ. The plane will do the advanced pattern , but not as well as a pure 90-120 pattern design... and it wasn't nearly as good as my U- CAN- DO 60 with an OS 91 pumped for 3d. It's a compromise design as most who own it will tell you, not bad , but just that.