My local pawn shop has had a 940 for a while and today they offered it to me for $100. I decided why not and picked it up. However, it does need some TLC, so should I crack it open myself or send it in? I am no stranger to the inside of a knife and I found a video showing how to disassemble a 940. The only thing I am worried about is the warranty. Should I let that bother me?