One of my neighbors decided to clean out his sheds and get rid of stuff he hasn't used in years. One of those items was his Craftsman 12" bandsaw which he kindly gave me. I haven't used one in 30+ years in high school shop. Shoot, I'm not even sure what I will do with a band saw but, you know, free tool. I have not had a chance to start it up, but my neighbor said it works. So what do you suggest I do to test this out? One more thing, what are the knobs for by the blade?