The present invention is directed to novel polypeptides and to nucleic acid molecules encoding those polypeptides. The first component is operable at a maximum duty temperature and the sacrificial component has a melting or sublimation point below the maximum duty temperature of the first component. The processor is further configured to, in the event that the coarse location is not within the auto check out location, determine whether a fine location is within an auto check out location. When the deformed casing pipe or patching pipe obstructs the pipe expander from moving forward, the steel balls will move in the reverse direction of the movement of the expander to directly expand the deformed pipe.