I made the base in two pieces for strength. Print all pieces oriented as they come. The quick shoe and base parts will need supports. The base slides in to the bottom of the shoe and is held in place when the mount is inserted into the tripod.
The author remixed this model.
Added a standard tripod quick shoe and reduced the x/y of the screw just slightly so it fits better. Props to 3D-maker for a simple but effective design!