I am setting up the Twinsync with two Astroflight controllers. They are off at a pulse width between 1.45 and 1.5 milliseconds. Above that, they are full on at 1.85 milliseconds. Below that they are in reverse up to 1.1 milliseconds. Right now the motors are doing as commanded by the throttle stick, for the small amount I can use when on the bench and not in the water, but one of the yellow LEDs stays on at idle or off. At full throttle, with the motors disconnected, they are both off. Does it make a difference if the yellow diode stays on? Dan.