It makes it easyer if you make sure the peramiters on your radio are at the centered point .Spectrum transmitters have a beeping sound with each click or movement of the switch going up and down the scale with a solid note to let you know peramiter is centered on transformer then place servo arm 90% off then screw in or out clamp for settings just remember you need to be able to shut down engine with peramiter switch after flight. its alittle tricky but you"ll get there.