So you are saying that the most critical parts subjected to stress in a helicopter are TR, TRGB and tail boom? But the most critical part subject to load factors it's the MRH, what I'm saying is that it's the MRH that has to be resistant enough to be punished with all the stress made by the helicopter since it's the MRH that is attaching the RB to the helicopter fuselage. What you are saying is that what limits the stress on the helicopter it's not the MRH but other components?
Best regards and thank you for the help.