A pattern by Alex Fox. He lists this one as C15. I modified the pattern by increasing it by 25% and not cutting the bottom ring, but leaving it attached to the next to the last ring making the ring less fragile. I used 1/4" solid Walnut approximately 10 inches square. The holes drill with #68 bit and cut with FD UR #1 blade. The finish is spray Polyurethane Clear Satin. Comments welcome.