I have a 250 t rex dfc I have adjusted all settings as per your u tube video and the Gyro setting in my DX8 radio is 70% the tail is fairly solid but while hovering the whole heli starts gyrating around . It's like you hold the blades and swing the landing gear. I have replaced everything and there is no play anywhere. the blades are tracking perfectly and the swash is centered and level. I have never had any luck with a 3gx but your video made me try one again. Any Help will be appreciated.