How do I change the joystick head?

1. Use the two side buttons to open the storage compartment.
2. Use the round metal disc key supplied (or a flat-headed screwdriver) to hold the joystick post in place.
3. Unscrew the current joystick head in a counter-clockwise motion.
4. Use the round metal disc key to hold the joystick post in place.
5. Screw on the new joystick head in clockwise motion until it is firmly in place.
6. Close the compartment.