My reply a little late but if you haven't found solution yet here is how I set up throttle. First install a screw lock pushrod connector on END of servo arm. Set throw of servo to 80% on Tx run pushrod (wire or cable) through plastic tube connect to throttle arm on motor Whatever means you wish,(Z bend, quick link). Turn on radio put throttle in high, place end of pushrod through screw lock, tighten screw on to pushrod with throttle fully open . Place throttle in low, check on throttle barrel if not closed adjust linkage and throws to provide fully open and fully closed. likely it will take a bit of adjustment to provide full high and proper low motor desired. You want throttle barrel slightly open at low with motor trim at neutral thereby allowing motor shut off when trim is fully down.