I love metal mechanical puzzles (Wil Strijbos’ and RD’s for example) and I’ve designed a few of my own as well (and I promise my Model #357 will ship this year come hell or high water!) So over time I’ve become familiar with machining processes and the tolerances they can hold since they’re the key to making a metal puzzle with a good feel. A few years ago I came across a super expensive but […]