Harry is the master! And, you're right, the greatest threat from bike thieves is a physical attack. Unfortunately, a beefy lock doesn't always guarantee a positive outcome. Point of order--a customer once entered our bike co-op with a beautiful Surly that he'd secured with a Kryptonite Fahgettaboudit. The lock worked flawlessly--the frame, didn't. While no theft occurred, the owner was still left with an unrideable pile of parts. Had the bike been stolen, insurance would have covered the loss.