I find the best way to use scale to get them to work properly is to take two 2×12 or 2×14 about 36 inch long screw two of them to gather so you'll have 4 ramps raise car up set scales under each wheel then put ramps behind scale and roll the car back on ramps zero your scales push car back on scales that help take in binding out and if you want to bance the car up and down do on the ramps not the scales. Just how I do it and was taught to do who set up a lot of car