Justin Jee ( http://www.JustinJee.com ) FaceBook ( http://alturl.com/ohzkf ) is flying his Trex700N with OS91HZ engine. He has been flying this model since 2008. I believe the uBeast was added in the summer of 2010 with ADK FBL conversion. It still has the original FB head block and grip so the heli looks tall in today's standard. This frame has just undergone CHP direct link frame conversion.