[HSVREDSLED]

Would be easy enough to do. Critically important is the consistent camera angle/height so a tripod is a must. As you say, mark the place for the wheels, then adjust the camera height so that the top of both doors is dead level with each other. You can see in the shots posted that the consistent angle is not achieved due to tops of the far side doors showing in some but considering the shots were not taken in a controlled environment the results are pretty damn good and very useful for comparisions!