Trying to connect a 2nd Slave Remote Controller. Anyone know how to do this? It clearly states on the DJI website: "multiple slave controllers supported" although I just spent an hour and a half with a support person on chat at DJI who ultimately decided that multiple slave controllers are not supported. I'm confused because I heard about multiple slave remote controllers at the Inspire 2 launch and it says it on the website also. My goal is to have the 3rd Remote Controller at Video Village to display the image in professional manner.