Focha -
I understand that, still what I am affirming is that the MR is designed to withstand stress greater than the stress that other components withstand, is my statement correct?
I am not a helicopter designer but it is the major component of the aircraft so the answer is probably yes.
As far as G loading goes, 3.5G is a lot in a helicopter - the Lynx can be looped and backflipped pulling less than 2.5G so to get to 3.5G from an aft cyclic pull would require a very harsh control input in something like an R22 which has a lot less responsive rotor head.
I used to teach steep turns in the Lynx at 60 deg AoB and yes it is a 2G manoeuvre in its steady state and requires a lot of power to maintain the speed. Pulling back on the cyclic will increase the G in the turn but you will climb and wash off speed an you are very unlikely to get to 3.5G - that would be more likely to be achieved if you tried to recover from a descending turn with aft cyclic without rolling off the high AoB.