The electrically-conductive filler specifically may be selected as depending upon one or more of conductivity, lubricity, resin demand, hardness, chemical compatibility, such as with the polymeric component and/or the material of the work surface 23 (FIG. 1), and cost. [0040] Particularly in the case of the layer 23 (FIG. 1) being formed of copper, tin or graphite powders or other particles, or a