Put on your safety equipment. Use the router to cut around the template. We’re using a 50mm long 0.5 inch diameter flush trim bit, which is perfect for cutting around this job. When you’re cutting out bigger sections of ply, take them out in small sections. If you’re not comfortable using a router, trace the outline of the template onto the top of the ply with a pencil, so that you can see exactly where the router is going. Once you’ve routed around the MDF template, remove the screws so that you’re left with the ply stool top.