About this 3D model

4x4x4 Puzzle generated at http://3dprintablepuzzles.com/paranoiacube/. Most of the pieces can be printed without support, but not all of them. You can see the solution here: http://3dprintablepuzzles.com/paranoiacube/solution/587faa2c4f9da This pieces does not correspond with the puzzle of the pictures, it's a similar puzzle, but another random generation.