I'm fed up with paying extra cash to mount my online tire purchases at motorcycle shops. I'm an old dirt bike guy and have changed tires with hand tools many many times. I can't do that anymore because it causes me back pain that lasts for days. I'm researching cheap tire changers, specifically the one sold at Harbor Freight. Does anyone have experience with these? Are they easy on the back to use? Are they suitable for maybe two or three changes a year?