I bought a large tanto CUDA a few years back, and it's been my daily carry knife ever since. It handles the abuse I give it, it's still shaving sharp, and it disappears in my pocket when I'm at church. HERE'S THE PROBLEM. I think I've finally found the weak spot. The sliding button on my knife likes to work it's way out, and kind of jams the knife blade when you close it. The play in the button is very slight, and I don't even notice it until I try to close the blade. It usually happens if I open the knife too hard, or when stabbing into a solid target. The button snaps back in, and it works fine after that, but I really don't want something breaking while I'm depending on my knife. Has anyone else had this problem? Any suggestions as to how to fix it?