Checker piece, printable, stackable

This is a checkers piece designed to fit properly on a tournament-sized chess board with a 57mm (2.25 in) square size.
I found that standard checkers were too small relative to a full-size chess board. This checker piece is 75% of the square size, to give the proper feng-shui relative to the board size.
All of the existing stl files I found were not printable without supports.
This one is designed to be easily printable without any supports. It is stackable both ways. (bottom to top, or top to top.)