The present invention relates to a method for making a substantially cylindrical tool from a substantially planar substrate, wherein the tooling has at least one patterned surface. A dielectric layer is disposed on the active region layer, and a metal active region contact is disposed in the dielectric layer above the active region and electrically contacting the active region. A reinforcement disc is attached to the wheel disc by bolts. In another embodiment, a series switch bridge has a first pair of switches connected in series with a second pair of switches across a voltage input, each switch within a pair of switches is switched in-phase with the other while the first pair of switches is switched out of phase with the second pair of switches.