I have trex 450 witch I built and fly. I am setting up a 450 coptorx. I have coptorx electronics and the ESC has a electronic device between it and the reciever. Not sure what its purpose is, im guessing to stop interferece with the reciever? Anyway this unit is getting hot after a little while when on.Im still setting up so I dont have the motor pluged in at this point. What is this unit for? Is It bad becouse its getting hot? Is not having the motor pluged in causing it to get hot? please if any one can help I would appreciate it Thanks Jeff