Redbull,
Here is a tip for picking Best locks. I find that you have to be more forceful with the picks. Harder and more abrupt raking and more umph when raising idividual pins. At tleast this is what I find most successful. I think the reason is because of a big pinstack. You have change key pins, master pins, control pins, and finally top pins. They're squeezed right in there. Good luck.