Hi, there this reply might be a little late, but maybe it might help someone. I had aproblem with the tello going higher and higher on it's own when using a firmware updated gamesir T1. After the update i had calibrated it as instructions said to rotate the left joystick 3 times and then the right one 3 times. I found out that you shouldn't rotate the joystick but simply push them in each position up/down, left/right. Do that 3 times, that solved my problem. It also seemed to solve the error "please set all controller sticks to neutral". Regards