I managed a service station/detail shop for 20 years, got spoiled with having the tire equipment handy, changed / repaired all my own tires. When I left that job, the first thing I bought were a manually operated tire changer & a bubble balancer, still fix & change my own tires, bought the equipment for about the same price a tire shop would charge to mount & balance a set of tires. Yeah, I know, 'bubble balance.'....but I've never had a balance issue from using it.