2. There'a a good purple paperback on picking combo padlocks. It's not as fearsome as it looks. At first glance it looks like there are 40x40x40 =64000. In reality there are either (10x10 -10 =90) or (12x12 - 12= 132) trial combos. You get the last number by trying each (of 10 or 12) "gate" after dialing the first 2 numbers. On average, you'll hit it half way through the possible number of combinations. Maybe a couple of hours work and buying the purple book.
