4x4 Slide Puzzle Improved

Here is an updated version of the 4x4 slide puzzle. The original version had tolerances that were a little loose, and the pieces could be pushed out of the puzzle. This version has been made thicker so that the pieces can go further into each other while still being printable without supports.

Original Model: https://www.thingiverse.com/thing:3893476

As usual, this model is made available for commercial use. I humbly request 10% of profits if sold, but I have no mechanism to enforce this desire. If you print this model to give away, no kickback is needed.