The intensity of first reflected ultrasonic waves reflected from an end of a first electrode tip is measured while the electrode tip is separated from a workpiece. The airfoil extends a span from a support to an end in a radial direction. Drying the wet ionomer layer with the impregnated reinforcement layer and joining it to the catalyst coated diffusion media forms an assembly that includes an integrally-reinforced proton exchange membrane layer. The process has advantages of low cost and improved removal of contaminants. The write word lines are insulated from the magneto-resistive elements and adapted to apply a magnetic field to selected magneto-resistive elements at the time of writing data to the selected magneto-resistive elements. The user interface further enables a user to dynamically configure a replica of a replica copy.