Increase the resistance/friction of the joystick of your transmitter to multicopter spinning due to accidental mis-operation or off center of joystick.
3D Printing Joystick Resistance Increaser for DJI Phantom 3, Inspire M100 Transmitters (One piece)
Material: 3D printing plastic
Outer diameter: 64mm
* Price is for ONE piece.
1 x Joystick resistance increaser