Impossible Nut & Bolt Puzzle

thingiverse

I was inspired by Chris Ramsay's video on the Impossible Nut & Bolt puzzle, a level 10 Hanayama Puzzle, which sparked my desire to design and model this challenging puzzle. I want to emphasize that I don't own this idea, but rather aim to recreate it as closely as possible. Please check out Chris Ramsay's video at https://www.youtube.com/watch?v=YWeVk0uzux8&list=PLNZrOW6Nuocr8CeCyFIq-P1l69YddtwwV&index=12&t=854s for a detailed explanation of this puzzle. When I first started working on the nut and bolt, I found it was too tight on the bolt but still spun with considerable force. To address this issue, I added a looser nut version to make the puzzle more manageable. After some users were caught cheating by removing the hidden object before completing the puzzle, I modified the inside of the puzzle to include a chamber that can only be accessed once the puzzle is fully opened. Based on user suggestions, I made an edit to include easy removal versions of the screws. This change helps prevent damage to the screws when removing them from fixed build plates. However, if you're using a removable flexible build plate, it's recommended to stick with the standard screw versions.