I just posted this over at RCtech, but thought I should ask here too. I think this will be a pretty easy question . . . how do I bind another RX to my 4pk? I just got another r604fs and can't get it to bind. The RX is blinking green so I know it's getting a signal, but my TX still says M1. Do I need to select M2 first? If so, how do I do it? Thanks guys.