Well I certainly do not know for sure and do not want to sound like a do!

But I suspect that the 2 receivers communicate serially using some proprietary protocol, and either mix their signal results (like the ACT does) or somehow come to an agreement on who has the better signal at any instant. To do this, the cable between the 2 recievers can be very simple. They could connect the servos to just one receiver, or some combination of servos to both receivers, depends on how they did it.

BTW, ACT does this same thing, but on 35 MHz. you can connect any servo to any of the 10 ports on either receiver. The servo gets commanded by the good signal, whether that signal comes from the reciever the servo happens to be connected to or not. Slick.

Can't wait to hear more details. Wilcox told me that Huhn really had that Bandit wrung out, like 2500 feet away on either side of the pass!