I have a craftsman 10" bandsaw that's about 4 years old and takes blades that are 70-1/2". I got a pack of 3 blades... 1/8", 1/4", and 3/8". The 3/8 blade cuts straight and true. The other blades wander terribly especially in oak. I'm not using a fence either... they simply will not follow a line. I've got lots of tension on it (although I'm not sure what is adequate. I've heard a blade shouldn't deflect more than 1/8" so that's what I'm running with.) The blade runs at the front of the wheels with the teeth running just off the rubber. I am at a loss. Any suggestions? I would be glad to hear them.