When you are flying and you get to the edge of your RC's ability, is it the FPV that always gives out first or sometimes the Phantom controller that goes into failsafe? After big tx and upgraded antennae on tx and rx, I would think it might somestimes be the controller that loses connection. Does anyone switch out the controller's stock antenna? I don't see any posts about that. I just purchased the Phantom 2 w/gopro and looking towards a 5.8ghz FPV setup.