Greetings everyone (since this is my 1st post on this forum).
For me, one of the easiest locks to pick was a small, cheap (about 1 Euro worth), all-brass, europrofil cylinder, made in PRC. I picked it with unbent paperclip (as a rack) and fingernail (as tensioner) to persuade one of my customers to buy KESO lock
It was supposed to be a 5-pin cylinder, but after disassembling it turned out to have only 4, rounded, with about 1mm tolerance each (in each direction). In other words, this cylinder wasn't worth a look.
But "it counts as one" nevertheless.
On the other side, it is one of only a handful of locks I've opened, since I do some lockpicking only for about one month now and only in my spare time at work.
Peace.
Mirek