Support BladeForums! Paid memberships don't see ads! I started an account here to ask about something. Hopefully I came to the right place. I bought a Kershaw Thistle recently, and I really like almost everything about it. I only have two problems. First, which I hear is common, the pivot screw gets loose quickly, and needs a driver to tighten. My previous KA-BAR folder also got loose, but I could tighten that with my thumb, so this is a new problem for me. Second, it opens far too easily for my liking. No other knife I've had opens this easily, and all of them cost less than the Thistle, if you can believe that. I can just shake it and the blade comes loose, even when the pivot screw is properly tightened. I don't like that. The first is easily solved with thread locker, but the second isn't so easy. Now, when I look at the inside of the knife while it's closed, I can see that the ball bearing barely has any interface with the detent in the blade. My Smith & Wesson folder has a much stronger interface and it's rock solid. So my thinking is, if I can drill out the detent a little bit, it should solve the problem. Maybe bend the liner lock a bit while I'm at it, since it's also a little shallow. What do you think? What size would the drill bit need to be? Am I on the right track? The 26 cents in my bank account all told me that I'm not exactly in a hurry, so I have plenty of time to make a decision. Thanks. I'll bookmark this thread and be back tomorrow. EDIT: Well, I didn't get a response, but I do have an answer. Different knife, exact same problem, exact same reason. Hope this helps someone.