Just stick with it. The Master locks I have (and I have a few) don't require much tension at all. If you've got a twist in your tension wrench like mine, you may be able to understand this next statement. Use *just* enough pressure on the tension wrench to make it flex. I'm talking about the minimum amount of deflection in the wrench. I pick by feel so, I just picked up my Master #930 and picked it watching the tension wrench (I don't usually even look at the lock at all)... That's the tension I used... Just enough to cause the wrench to flex ever so slightly... The #930 has five spool pins but, with that tension, I just picked it in about 20 seconds.
Using too much tension, you'll have more than one pin binding. Use too little and you either won't have any binding pins or you have to pay VERY close attention to the lock... Otherwise you won't notice when a pin sets. I may or may not be using too much tension. I can usually hear - very clearly - when a pin sets.
Maybe someone else will chime in and tell me I'm such a total n00b that I should just shut up.

I'm sure there are lots of folks here who have m@d sk!llz way beyond mine.
No matter what, just stick with it. I actually find the master locks fairly easy to pick. I like them for that reason. They make me look like I know what I'm doing.
