Hextraction Tile: Angry Crab

My "Angry Crab" tile for Hextraction.

A ball going down either side channel comes out the same side. A ball going down the middle channel gets trapped until another ball goes down either of the side channels, at which point it gets ejected on the opposite side (resulting in one ball on each side.)

The model was created in FreeCAD; the FreeCAD master file and a STEP file are included.