Abstract: Methods and associated apparatus for adjusting the tension in a bowable member using a gauge having an indicator activated upon the gauge being pressed against a resistance having a threshold force. The gauge includes calibrating apparatus for adjusting the threshold force. The member is held in adjustable tension-applying apparatus. The method comprises the steps of operating the calibrating apparatus so that the threshold force corresponds to a desired level of tension in the member and pressing the tensioning gauge and the member together to cause the member to bow while operating the tensioning apparatus to reduce the tension until the indicating apparatus is not active, and then operating the tensioning to increase the tension until the indicating apparatus is active.