=== Expo ===
* If you have trouble being precise, do not hesitate to add expo to stick input
* It's increase increasing travel of sticks in the middle needed for the same amount of movement and decrease decreasing it at the end for faster response
* Never add expo on the transmitter, you'll loose some stick definition
* Add RC expo on Betaflight, starting from 0. 30% (0.3) RC expo is a good starting point