So I get asked to open a lock on a box that the key is not working today, a master 575. We don't want to use the bolt cutters because the box could be damaged. I pull out the bogata and go to work, everything appears to be working but it just won't turn, I put the key in and it is obviously not working, I SPP it, can't find any pins after I get them all to set, WTF. I realize I am picking it upside down, I think, broken spring.
I turn the box upside down, tap the side of the lock to reset all the pins and put the key in, and presto it turns... Sometimes the simplest solution is the best and quickest. We got the lock off, and tested my thought on the spring, opens right side up but not upside down. Good to know, to bad I can't fix the spring, but I learned.