Caster and camber have to be measured at the same time as one setting will effect the other.... Bump steer and roll axis are also very important. A laser level might be accurate, but I doubt the procedure for mounting it at exactly the same point from side to side would be as accurate as the tried and true caster/camber gauge. These settings also have to be measured in a correct procedure, with the wheels turned to 20 degrees right and left of center, thus the need for the turn plates....