Thanks. I am using an ESC with my Rx. So I plug that into Channel 3 and plug the battery into the ESC. I plug the other servos into channel 1,2 and 4. When I move the Tx sticks the servo's don't react. I know the ESC is good. However, I don;t have a mottor pluged into the ESC. Does this matter. Do I need to have the mottor plugged in to complete a circuit or something.