the lockpickkid wrote:Yep, I never thought of that, UK installs there locks with pins on the bottom, some of us redneck folk out in this country do the same!
We mainly use euro cylinders, which are mounted with pins at the bottom, but rim cylinders (with the pins at the top) are also common, especially on older houses. You don't see rim cylinders on newer developments much, although I've seen a good few with keyed alike euro profile and rim deadbolts on the front door. All depends on the area.
To answer mandelbrots question, there is no way you "should" pick them. It's all personal preference although I always pick them as they would be mounted. I actually asked the same question a long time ago thinking that if the pins were at the top it would be easier to pick because the pins would be less likely to overset. As it happens, this is not the case. :p
The only difference is the kind of feedback as you roll over the pins. As you know, when pins are set, they lose their spring resistance. If the pins are at the top they will feel loose, likewise they will feel hard when mounted at the bottom.