You said, "So, When one strings a rqt, tension is applied to a string between to fixed points, where those points can be a starting clamp, a fixed clamp or floating clamps. Your fixed points are at either end of 2 adjoining strings. What you are implying is that the 2 fixed points that 1RM is being correctly & accurately being tension between is the tensionhead and the top of the frame where 2RM enters the grommet (or as near as)." When one strings a racket tension is applied to a string by connecting a force (tensioner) to one end of a string and an equal and opposite force on the other end. Newton's third law - for every action there is an equal and opposite reaction.