Before I install my servos I go into my radio and adjust the servo throws to max the servo can use. Hook up your servos to the receiver turn everything on go into your radio find the servo page in my Spektrum DX9 it is called throws. I start turning up my throws until I can hear the servo start to chatter and back of a couple of clicks. This will give you full range of your servos but also make it more linear to your stick movements.