A method of adjusting the position of objects in relation to a datum plane, the method including the step of providing a mark on the objects at a known distance from the surface of the objects that will be positioned in predetermined relationship with the datum plane. One of the objects is next placed in the predetermined relationship with the plane, the object being moved from an original position relative to the plane after a predetermined period of time. A second object is then placed in the predetermined relationship with the plane, and a beam of light is directed to the second object, the beam providing a light image on the object. The second object is now moved until the image of the light coincides with the mark provided on the object.