Container for Go Pieces

I needed a new container for my go pieces, so I designed this one. Instead of using CAD like a sane person, I worked out the mathematical formulae for the corners of the curves of the Yin-Yang symbol, taking into account the radii of the circles and holes, the amount of smoothing I wanted for the edges, and how much of a gap I wanted between the container and its lid, and between the two halves of the YinYang. Then I coded all these formulae up into a python program, which I ran a few times to get STL files with the exact measurements I wanted… a beautiful Go Piece container that fits perfectly snugly and is just the right size to contain all my pieces.The container lids double as receptacles to store the captured pieces as the game progresses.