Dave, refering to post #4: The only reason you can take your hand off a fixed wing stick is that there is a good trim system built into the elevator, and ailerons, which centres the stick. A helicopter with a similar trim system could also fly hands free - this is the point of SCAS.
Your design, like any counterotator, does allow good handling with a very high effective hinge offset. Again SCAS can compensate for any assymetry for a single rotor. Your design may well be better suited to fast rolls though.