JimEli, re post #15; I don’t recall the tab you refer to in front of the throttle quadrant. Can say that it wasn’t part of the blade clearance instrumentation, as that cockpit clearance senso was further aft on the roof so as to be the least clearance point as measured from a straight line from the elastomeric flapping hinge to forward structure. ( I do not recall this detail, but typically in discussions like this, there was additional consideration of the blade bending resultant after contact with the in flight droop stop ).