What I was trying to say is that it would not be as easy as putting an additional blade as they did on the H145 going for 4 to 5 blade. and instantly claim another 150Kg of payload.
purely a 3 blade rotor would also be less aerodynamically efficient (more friction drag as well as well as induced drag for the same trust)
It would probably require a brand new design from head to toes, Something we have all hoped the cabri G4 would become, affordable, safe, modern...