Opening a Master Lock in 10 Minutes
Inspired by reading this hackaday article, I walked across the street and purchased a lock for $4 and had a crack at it. I think it took me about 12 minutes to find the winning combination. Scary, but fun!
The “Master Unlocked” tutorial was a bit more robust and is the one I’d recommend if you’re having problems.
Haha this method helped me out so many times in high school, because I forgot my combination every summer (I guess I should have written it down). Near the end of senior year, I just got some padlock shims and used those instead, since it was faster than actually entering the combo.