Setup for 3D, the joysticks of an expert's transmitter are neutral when centered (the 0-degree point of the switchless inverted setup). It's how Tigers hover upright at 3/4-stick and inverted at 1/4-stick! But an expert's Tiger can be tamed for beginners simply by adjusting the curves in the radio - without touching the mechanical setup. Tiger 50's are designed for expert pilots . . . and those destined to become pros! The manual tells you how.