We have had our Phantom 2 with Zenmuse gimbal for about three weeks. We have had many successful flights and captured some great video as complete newbies. We decided to order some new props and order online from Amazon and got these new generic 9443 R props (supposedly Nylon). The first flight with new props and the Quad went nuts. First it went into hover no problems, then shot up to about 15 feet and started acting very erratic. It would not respond properly and acted as though it had interference with signals. Finally it crashed. Props didn't even have a nick. Tried several more flights while trying to hold on with complete GPS signals and this thing is acting crazy. We replaced the propellers with the Original DJI 9443 and everything is back to normal and works great again. WHY? Anybody else experienced this problems? The props I order say O-XOXO on one blade and 9443 R on the other blade of Each Prop. They look identical to DJI otherwise.