I'm not a machinist, but I've been making knives as a hobby for many years. I have a JET horizontal metal cutting bandsaw, which is modified for vertical use with a table. I'm having a problem with the blade popping off the wheel. This usually happens when I'm pushing hard, and happens with wood or metal. Also full disclosure, I'm a cheap sonofabutch and keep using old blades, dull and missing teeth. I have tried playing with the blade tension but that doesn't help. I want to keep the blade from coming off. Do I need to adjust my alignment of the wheels with my roller-bearing blade guides? Do I need to use better (new) blades? My wheels are metal, should I add a rubber liner on the wheels? Is it speeds and feeds? (I don't think so) Should I junk this Piece OS? Buy a new (cheap) one? ... other comments?