3D printable Puzzle Cube

Submission for Ultimaker's Challenge. 3D printable fully working Puzzle Cube. The idea is to place some color or custom stickers in each face. All parts are in .IGS format but please ask if you need SolidWorks model (parts + assembly). They are basically 1 middle part and 3 different cubic parts: - 6 x 1 face (connected to the middle part) - 12 x 2 faces - 8 x 3 faces (corners) Each cube is 20x20x20 mm. So the whole cube assembled is 60x60x60mm.