Review on Mind-Bending Challenge Unleashed: DELTA Hanayama Metal Teaser Puzzle by Arnold Carrigan

The puzzle was well designed, but I had an error. One part had a problem sticking to another part. I can only assume sticky residue or the coating wasn't fully cured before installation. I have attached photos showing the stuck parts. And a picture from the inside showing the gray metal due to the fused parts. I had to look up how to solve it because the pieces were stuck together leading me to think I was doing something wrong. I set it to the right configuration before I gave up. After watching a solution video on the internet, I realized that I had solved it correctly. I ended up giggling and tugging with all my might to finally separate the pieces. Another problem was that the tip of the hook was too long and I filed it down to make the puzzle work properly.