Hi Guy. This may seem a bit convoluted, but I did it on a project and it worked fine. I, too, had to make multiples, and leave a clean surface. I made a jig out of 1/2" cabinet grade plywood, then used the smallest clamps I had to clamp the jig, on top, to the three pieces of rough cut (on a bandsaw). The clamps projected about 1/2" below the bottom piece, so I used some double stick tape to secure a piece of 3/4" plywood right in front of the router bit coming up through the table. I used a 1" long bit with a bearing end, and adjusted it up to the correct height. Then as I made my cut, as I got to a clamp I simply removed it for the time it took to cut out that part, and then replaced it after the cut was past. I used four clamps, and the other three kept everything together just fine. The jig took the longest time to make, and that was a simple carbon paper tracing onto the 1/2" ply. Sanding the edges gave me a nice smooth jig.