The aircraft also had a system that automatically lowered the collective should the engine fail.....maybe Robinson should copy that!
The Rotor head sounds interesting as well.
The rotor blades are attached to the hub by light-weight stainless steel L-shaped angles, which carry the blades' centrifugal load: the short leg takes up the loads due to blade weight, the long leg the bending load caused by drag. As in the Seibel helicopter, this assembly not only provides angle movement for changing blade pitch but also eliminates trunnions, thrust bearings, hinges, etc.