The 3D-printed parts are of excellent quality, almost like mass-produced. However, the screws are too short. After one turn, the puzzle simply fell apart. I had to replace all 10mm screws with 15mm screws myself. Now it turns fine. Disassembly was not easy, unfortunately, because some stickers cover the seam between parts and have to be peeled off before being able to take off the cap. Maybe they could improve the design. Otherwise, the puzzle is fun.
