{HEAD ~ A load pin}, having at least one sensor, is mounted through the universal joint type coupler as a pivot pin and is oriented within the universal joint type coupler so that at least some of {TAIL ~ the installation torque} is transmitted through said load pin and is measurable by said at least one sensor 
{ HEAD ~ A load pin } , having at least one sensor , is mounted through the universal joint type coupler as a pivot pin and is oriented within the universal joint type coupler so that at least some of { TAIL ~ the installation torque } is transmitted through said load pin and is measurable by said at least one sensor
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