BUBO Base Block

Truncated octahedron building block.

Blocks can be joined together along hex faces to build complex models.
Special designed triple-knob connection system takes care of proper blocks orientation and lets you build freely in any direction.

There are some other compatible variants of BUBO blocks.
This one is the most basic and self-sufficient part.

I would suggest using the latest version of the model (v3).
I have uploaded also the first prototype version as a reference - tests revealed a few weak points I had to correct.