I'll be honest, this is an easy puzzle box. The goal is to remove the ring and even people who don't like puzzles like this will be able to solve it without getting frustrated. BUT, this is Karakuri. The craftsmanship is second to none, feels good in the hand, looks great on a shelf.
Only shipping lower 48 and payment only through PayPal FF. Wait to pay until I reach out and calculate shipping. Good luck!