"One point you make may be very valid. A system operating on 4.8 volts will have a lower window of operation than a 6 volt system(1/3 of 4.8 is less than 1/3 of 6.0). This means the lower area for the chip to see the "high" signal could potentially be lower and accept the signal from the Rx. Thes really depends on the style of chip used in the servo or whatever you are trying to operate. "

Gary, what are you saying? That 6 volts is better than 4.8?