Checkers set pieces

All the existing checkers I could find online either did not have the traditional stacking ridges or the ridges were too small for my printer to print them successfully. So I designed my own with larger ridges that print easily. It's a standard 38mm diameter and 9mm tall, but you can scale it as needed and the ridges should still work the same. They print on their edge because I was having issues bridging cleanly on the bottom of the piece when printing it flat. This requires a small brim, but it can be cleaned up with some sanding tools after printing.