I assembled the 600 TVL camera and the hero3 Black to the hexa and then tried everything out last weekend to make sure everything was working correctly and bout cameras and goggles worked fine. Well this morning I was getting ready to fly and after putting the goggles on I had no video. As a matter of fact the goggles would not even turn on and that's with a full charged battery. So I disconnected the 600TVL camera and connect the gopro to the tx and I had the same thing happen. Well I still flew around some with the F550 for a while. Then I spooled up the F450 and after about 2 mins of flying I lost orientation and piled the F450 into the ground CARP. So I got mad and drove home to discharge the rest of the batteries. Well while flying the F550 in the front yard about 4 or 5 feet off the ground it made a sharp dive to the left. I was able to recover and land without crashing and then noticed that I only had 4 motors spinning CARP CARP. Talk about MADDDD I was about to blow a cork for sure. This really turned out to be a bad day. But if those 2 motors on the F550 had cut out earlier when it was about 60 feet up it would have really been bad. I guess I'll have to open the goggles again and see if there is any thing visiably wrong I really had when this crap happens. First thing that came to my mind was SELL SELL. LOL