Customer calls for maintenance and repair for customer equipment are handled automatically in a computerized network. Based on a multi-channel pixel intensity data set generated by a synthetic vision system, a single-channel pixel intensity data set representative of a lighted solid image of terrain comprised of a plurality of intensities of one color may be generated. The determined electrode system is then applied to the skin and an average energy density exceeding 5 Joulescm3 but lower than a skin coagulation level is generated in the target. The system also comprises springs located in at least some of the grooves and engaging the teeth acting to apply radial force between the disc and the hub. Alternatively, the pyridine may be co-flowed with a silicon precursor that does not react with pyridine.