Khối xếp hình Bucolic Cube

This is my own implementation of the famous Yasuhiro Hashimoto's 2013 Puzzle Design Competition entry Bucolic Cube.

This version has been optimized for 3D printing, with round surfaces of contact with the building plate, 45° overhangs for support-free printing, 0.2mm layer optimizations, and extra tolerance inside the "U" shape to avoid friction.

You can customize the final cube size using the provided OpenScad script.