Broke my Nox arm cuff the other day. I got ahold of a new one and modified it so it is now stronger than ever. I took a piece of 4 inch PVC pipe, ( just the right width! ), cut it to the width of the cuff and just below where the strap openings are. Did a little sanding to "round" off the edges and attached it with industrial 3M two face tape to the cuff. Then put the black cushion rubber on top. I have used it about 6 hours now of constant swinging and it is rock solid. $1.98 for the PVC and a little modification. We'll see how it holds up.