Bora Centipede 2x4 Bracket Mod

Have a Bora Centipede Workstand - great for cutting up sheets of plywood. The included 2x4 brackets are designed to hold the 2x4s either on their side or on their edge. Was worried about breaking their 2x4 brackets if I used their bracket to hold a 2x4 on edge and breaking if it received a push the wrong way, so I designed a bracket that fits within the Bora 2x4 bracket to hold a 2x4 on edge, and will "roll" instead of possibly breaking it pushed the wrong way.