The Rua was originally invented by Matt Shepit on the Twistypuzzles forum. It is a face-turning rhombic dodecahedron with the same cut depth as a Helicopter cube.
This model is a functioning replica of the puzzle. It is the first "complex" puzzle that I designed. As proud as I am of this puzzle, it has quite a few flaws, and requires a significant amount of post-processing to function. I am currently re-making this puzzle with totally different internals, which is why I'm releasing my old files. This particular design is provided "as is" and will not be revised.
This particular design has only been printed in PLA, and has not been tested with ABS. However, I have no reason to believe that it wouldn't work with ABS.
NOTE: Some of the parts were split in half to allow easy printing without supports. The two halves are designated "A" and "B" in the STL's.
NOTE: Two files for the core are included. The ABS core has slightly smaller screw holes.
1x core (ABS).stl OR 1x core (PLA).stl
12x center.stl (Hidden center pieces)
24x EdgeA.stl & 24x EdgeB.stl (Hidden edge pieces)
24x TriangleA.stl & 24x TriangleB.stl (Triangular face pieces)
8x 3CornerA.stl & 8x 3CornerB.stl (3-fold corner pieces)
6x 4CornerStem.stl & 6x 4CornerBase.stl & 6x 4CornerCap.stl (4-fold corner pieces)
Optional: 12x Tiles.stl (Tiles for the puzzle)
Additional Hardware: This puzzle requires 12 Dayan screws and springs for 57mm cubes, available for purchase at thecubicle.
Parts need a significant amount of sanding for the puzzle to be playable. In general, the fillets on this puzzle were not large enough, so in many places, sharp angles at intersections need to be clipped off or sanded down. If you make this, it is advised to break in the internal Helicopter cube mechanism before attempting to insert the outer pieces.