I have a Schrade that has a gap near the pivot pin of the main blade. Now I am worried that if so dirt or whatever got in it, it could grind down the tang of the blade. I don't think that will happen because I take care of my knives, but it is a concern. Now how do I fix it. I found out that Schrade didn't use a standard pivot pin, like a case knife. Theirs is unique. I can't hammer the liner to the spring. What should I do? I don't have a vice either.