My hats off to you. I've have had deaf people fly and the only thing I did differant was to tap the person on the shoulder for aileron control. Tap left for left and right for right. You can indicate just how urgent the need to roll is by the speed you tap. I've even used this to help people learn to turn the proper direction when they can hear. It seems tapping the left shoulder gets some people to turn left, or right, eaiser than saying it.