This is what Noah used for his ark

If you lose you camera Allen I'll send you another so that you can keep posting. Don't care what others think. I enjoy reading and seeing your adventures in woodworking cause you post everything from your mistakes to your triumphs. You let it all hang out.

Make a template for the inlay and use your router with a collar to run around the inside. Sguare the corners with a chisel and cut your pieces to fit.