A first component includes either linear bearings or linear shafts that are located at a fixed hole-to-hole or center-to-center distance. A second component, having linear shafts or linear bearings, respectively, is capable of adjusting the center-to-center or hole-to-hole distance of those second linear shafts or linear bearings. The center-to-center or hole-to-hole distance can be adjusted by relative motion between a first sub-component and a second sub-component of the second component, and/or deforming an elastically-deformable element of the second component. The second component can include a rigid stabilizing element and an elastically-deformable element. The elastically-deformable element can act as a pseudo-spring to adjust the center-to-center or hole-to-hole distance of the linear shafts or bearings that are attached to this second component to the appropriate fixed hole-to-hole or center-to-center distance of the other of the linear bearings or linear shafts as the carriage travels along the path of motion.