Review on SAVEMORE4U18 Magnetic Camber Alignment Measure by Drew Diaz

I bought two of these sensors for an alignment setup. They are good sensors and work well. They are repeatable - both sensors read the same thing at the same angle over and over again. However, they are NOT ACCURATE. I've compared them to my other three digital protractors and a handheld protractor - they read about twice the actual angle, ie the sensor reads 5 degrees when the angle is 2.5 degrees.