There is another method of supplying power without jeoprodizing the Rx. Remove the servo power leads from the reciever and install into their own panel. A small battery for the reciever and the main battery (large mah) for the servos. And for a gas airframe the ignition would go to the main battery. This eliminates the risk of losing power to the reciever totally. But of course one would need to put a second reciever battery to the reciever in case the first one died. And one could use a second for the main in case the main died. And don't forget the second reciever in case the first goes south, as well as the second transmitter. Oh, and then there is us ourselves, don't forget the spotter, he can take over when we fail.