Concave Rhombic Dodecahedron

The Concave Rhombic Dodecahedron is a novel version of the well known (convex) Rhombic Dodecahedron and inherits many of its amazing mathematical properties:

• Universal: One shape does it all, print as many as you want!

• Stable: The pieces stay together without glue or magnets!

• Versatile: The pieces fit in many aesthetic configurations!

• Autonomous: Any flat surface can be used as a base!

• Easy to store: The pieces can be stored in a flat configuration without holes!

• Easy to print: Print them on their side without supports!

• Strong: Low infill required (5% is enough)!

• Parametric: OpenScad script to customize size & rounding radius!

[UPDATE] See the new rounded version that prints better and doesn't scratch the table!