Lever Tumbler Lock

I wanted to implement a lock mechanism which is fully printable and relatively secure. The http://en.wikipedia.org/wiki/Lever_tumbler_lock seemed like the best bet.

See it in action: http://youtu.be/Fzuhta2IQZ4

The model has three tumblers with 6 bitting positions for each. It's keyed [0, 3, 5].

Note! The derived Fully Printable Padlock http://www.thingiverse.com/thing:27205 contains an improved version of this mechanism.