
Calibrating this tool to a known dead plane will likely give you a reasonable camber setting. However, I don't have any accurate alignment tools other than a $3 spirit level, which I just don't trust due to the accuracy required to check alignment. Having said that, I can tell you that this tool was essential to the job when I was replacing the struts on my wife's car. Most replacement stanchions are lengthened to allow for camber adjustment after installation, meaning they won't perform exactly like your old ones. You then need a front-end alignment to bring everything back to spec. I bolted the brake disc on with two nuts and read off with this tool (attached to the brake disc) before removing the old strut. After replacing the post, I carefully moved it in extension until the tool read exactly where I started. From what I can tell, this set the camber to the same value I had before the replacement. I've driven the car about a hundred miles since replacing the strut and haven't had any unusual alignment problems and the tires are wearing well. Your experience may be different, but I am very happy with this tool. Just don't expect your results to be exactly the same as an all-electronic vote and you'll be fine.