Juno makes jigs every time he makes puzzles and this time he made five jigs just for this puzzle. When he made the jigs, he paid much attention to the orientation of the puzzle pieces placed on to the sled type jigs to minimize the chance of chipping off puzzle pieces.
Polyhedral shaped puzzles sometimes become unstable and non self- sustaining when those are assembled. The puzzle pieces tend to come apart by the explosion type movement or coordinated motion. Reza 4-4 was the most difficult one to design the puzzle to be self-sustaining among the Reza family.
It is optional to make most consisting puzzle pieces identical in shape to make the assembled puzzle stable but he doesn't want to take that option because it spoils the fun of puzzles. He made the shapes of all the pieces of Reza 4-4 different and it gives you more fun to play with.
Reza 4-4 is now on sale.