A light diffuser tube for an LED array suitable for use with electronic gaming machines includes a mounting portion, a diffusion portion and a body portion. The housing has a guide recess for receiving a head of the handle, and for pivotally mounting the handle for movement about an axis generally parallel to the plane of the pad holder plate. A patterned electrode can be reconfigured easily for prototype or low volume production yet the method and apparatus are suitable for volume production as well. The head positioning control system uses the leading PRBS to generate a servo timing mark, the cyclic shift to generate track identification, and the following PRBS from adjacent tracks to generate the head position error signal.