Guess I have been misinformed. I thought that the "tape test" was conducted by applying the tape to the back of the frame where the rear toggle link impacts to stop the motion of the toggle. A heavy strike there indicates a weak main spring. A heavy strike on the ramp/camming surface of the frame might indicate that the mainspring is quite strong and the toggle knobs, which are held down partially by the strength of the spring, need more force to "break" them upward to unlock the action. Most likely I am wrong...wouldn't be the first time.
