Nice build (and write-up on how to figure out the combo) of a padlock. I like the fact they did a little tinkering to figure out how to solve the lock quicker without straight brute force. If you got a bunch of padlocks with no known combos, this maybe a way to figure it out. Wish the authors had published the source used.
http://www.wikihow.com/Crack-a-%22Master-Lock%22-Combination-Lock