An apparatus includes a reconfigurable stripe reader configured to receive read head signals corresponding to states on a magnetic stripe. The method comprises identifying an image data value of an original pixel within a portion of a document image. Generation of the digital signature accounts for a unique identifier nominally associated with the computing device. The oil change indicator indicates that the oil should be changed when the number of engine rotor revolutions exceeds a threshold value. The reduced-height waveguides in the base converge radially to a matching post at the bottom center of the radial base which matches the reduced height rectangular waveguides into the circular waveguide that feeds the mode transducer. The anchor rail supports the elevator guide rail and is partially embedded in the damping medium.