Matchbox Puzzlebox

It takes 7 moves to open, but after the first few successful moves, it becomes apparent how to solve. (For better or worse - but this is a fine intro into puzzle boxes.)

Created from wisps of internet vapor, based on a youtube video that mentioned this kind of puzzle. The person in the video had made a version from Bruce Vinley (homemadepuzzles.co.uk), but the plans on his site were...meant for wood, not in a CAD version, and it wasn't really clear how it worked or the sizing. If you're inte