I'm trying to setup a friend's T-Rex 450 with a RCE-500x gyro, and s75 tail servo.



I found an online manual for the gyro ( if you can call it a manual...), and there's much info about setting up the gyro. I connected the aux channel (gain) on the proper channel, and can't find a way to make the tail flyable.


So how must I setup that gyro? In which position must the mechanical gain adjustment be positionned to be able to adjust the gain via the TX? Etc...


Thank you!