I also posted this elsewhere:

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FYI all that is needed to defeat the very "best" locks is a can of freon "freeze"spray and a hardened steel striking instrument and something to use as a back stop. This is an old NYC bike theif's trick and one of the reason that Kryptonite finally had to limit their losses on theft of bikes locked with their products.

When I used to own a shop and customer would come in with lost keys to a Krypronite they had two choices: order and wait for replacement keys or once they had proven ownership I could have the lock off in 3 minutes or less. Chains, U-locks, anything can be easily defeated by a pro in 3 minutes or less. so quickly that suspicion is not stirred among passersby.
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Slim