I may be the lone guy to think this way, but- why is it that it is accepted practice in this activity for people to fiddle with, adjust, put a file to, grinder etc a lock, and then feel entitled to send it back to the manufacturer to " fix " it ? Now, I fool around with locks too, cause I want to learn , but I figure that I do it on my own dime. I buy the lock, and it works. The supplier has done their job. You buy a reliable Chevy , and want to turn it into a speedster, who would expect to have GM responsible for the " fine tuning" ?
Sorry, but in my shop,; you fool with it, you get billed shop hours for me to fix it.....plus parts .
I think Jim's too nice of a guy. If it has a problem, send it back. He'll fix it. Touch it, and the problem is yours. And that is just good business.