I had a couple of my Fillys with very loose pivot pins. But I had nothing to serve as an anvil. Rummaging around, I found a 12 inch crescent wrench and the jaw of this wrench was a pretty solid piece of steel. So with a ball pein hammer and the wrench jaw laid flat on my bench for an anvil, with a maybe 20 taps I tightened the pins enough--resting the lower pivot pin collar on the jaw-- so that the blades would stay in position when partially opened or closed. It seemed to work fine