I recently bought a Grizzly 17" bandsaw and today it started making a strange clunking noise. As near as I could figure it seemed to be coming from behind the hub of the lower wheel. Not on every rotation of the wheel, but every couple of rotations I get sort of a clunk as if one were to tap the body of the saw with the handle of a small screwdriver in the vicinity of the lower hub. I don't see any debris or anything in there and vacuumed around it the best I could. Has anybody run into this? Not sure what to do about it. It doesn't seem to affect the function of the saw but it's annoying.