I updated the old HarmonyII F3A bipe file (G4.5 I think) to fly better and work with RF9. Citrin and Allure USA schemes are available which look very nice. Switch C on the Spektrum Interlink controller is for snaps. The low rate has a bunch of rudder with lots of expo...this was needed to get decent spins and stall turns. Switch H is smoke that I use to track how smooth/straight the maneuver is going.