I am not a big Robinson fan but because of my job I have attended the R-44 and R-66 Pilot Safety Course in Torrance! Super course for the money and includes an hour of flight time in the course aircraft with a Factory Pilot! Also included with the course is a Factory tour! It really is impressive and the quality is top notch! Don't remember the per centage but most of the aircraft is manufactured there exccept for the engine! In my opinion most of the Robinson accidents are caused by low time Pilots that aren't proficient with some of the quirks associated with Robinson aircraft!