I recently bought a Rigid 14" bandsaw and after only about 30 minutes of using it with a 1/8" blade the upper tire had worked itself half way off the upper pulley towards the inside guard. Prior to using it I had went through the setup and verified the tracking and tension. Now the upper tire is so out of round it is useless and I'm waiting on a replacement. Any ideas out there on what would cause this and how I can prevent it in the future???