No matter what technology you get the RF link can go down.. someday, someway. Let the radio manufacturers continue to improve the game for you, but perhaps we need to push technology in another direction at the same time. Computers and GPS are so fast and small now, perhaps I or someone should make a small onboard failsafe autopilot flight computer. Something that you could upload coordinates at an event, where the event organizer will give you a preplanned "circle of death" flight pattern when you loose radio control for any reason and after a few minutes if you do not regain control it can ditch at a specified location...(net, foam blocks......the dump)

I'm probably going to regret giving up, yet another one of my ideas...

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bob