This test confirms that the "hydraulic logic circuit", upon which the 100% mechanical positional feedback system is based, works. Not only that, but it worked perfectly right off the bench. Note how the knee joint follows the position of the cylinder I am moving. That cylinder will be integrated in to the exo-frame which will then map elbow position directly to the knee position of the Leg. With this design validated, we can now proceed to the ultimate goal of full haptic operation!