yes, I train with "wireless buddy box"..

I started out using it to train flying the F550 with WKM, but as time went on.. if put together, it is really easy to teach without the buddy, so I moved my WRT-7 and shared out my control to the Zenmuse on the S800 now.... just like flying controls, I switch on or off, when I want the second controller to have control of the specific channels.. (this case, Zenmuse controls channels).
hope that helps..