Here are some tips to improve accuracy when using this system. 1) Find the center point on the wheel and align it with the center notch on the endplate. Then leave the bottom of the plate on the ground and press it against the tire before adjusting the lugs that rest against the edge of the wheel. Repeatability is key, no matter how you set this thing up, you have to do it the same way every time. 2) Mark a tape measure at the front and back and attach it to the desired location. Take the average of the two measurements and divide by 2. Mark this measurement with a marker at the bottom of the tape measure. You can use different colors for front/rear treads or even for different vehicles. Use these markers in conjunction with the vehicle's center line to help you set your lane. 3) Mark the positions of the wheels on the workbench with tape or spray paint. Roll the car away from that spot and zero the camber on the line, ideally speed squared or so, and roll the car back to that mark before measuring that wheel. You can also use a precisely cut piece of cardboard or polycarbonate as a turntable. 4) Roll the car back and forth a meter or two a few times, noting that it increases the load as you push. This allows the suspension and tires to return to their normal working position. This is particularly necessary after jacking up and lowering the vehicle. Do this before taking any measurements and do it every time. 5) Get in the habit of writing things down. of tire pyrometer and pressure readings in a competitive driving scenario. In my application, the actual amount is not as important as achieving the desired processing properties.