Transmitter stick ends

A gamepad style screw-on transmitter stick for 3D printing. They don't look as slick as the stock aluminum stick ends, but they feel great on the thumbs and provide improved control and comfort.

Fits Taranis and probably JR transmitters, but you can modify the [source files](https://github.com/brandonhill/Transmitter-stick) to change dimensions to suit any radio.