I know it wasn't the question but I've wondered why people are interested in these. They aren't cheap (cost 2/3rds the price of a 2 post or 4 post lift) and have limited use. You can't store a car under it, work in the middle of the car, work underneath (at least easily) and how often do you need both ends of the car up in the air? They also take up a garage space. Even with my 4 post lift I sometimes just slide a floor jack under one end or one corner to do tires or get underneath for a small job. I would look at one of those pneumatic/hydraulic floor jacks as an option or perhaps the Maxjax portable 2 post lift. Perhaps check our
www.garagejournal.com to see what people say about these.