A pump comprising an electrical motor drive and a pump engine, the pump engine having a stator portion and an axially and rotatably movable rotor portion mounted in the stator portion. The present invention provides an array with magnetoresistive memory cells arranged in logically organized rows and columns, each memory cell including a magnetoresistive element. If the master router fails, then one of the backup routers becomes the master to provide substantially uninterrupted service through the virtual routing system. Further, the arrangement comprises elements for making the direction of travel of the reel to deviate from the first direction of travel prior to the placing of the outer end shield, and end-shield collection stations, which are located within the operating area of one element placing the end shields, so that this element can transfer both inner and outer end shields for placing.