Did you have to bolt the tire changer to the floor?Already had a 21 gal air compressor, picked up one of those Harbor Freight manual machines and a balancer a few years ago, been changing my own tires ever since. With the right tools the job's a snap. At $50 per tire change at the shop I'd rather do it myself, save the cash and know the job was done right. And if not, I know who to blame.