An ink development unit is disclosed for liquid electro photography printers or the like. In one embodiment, a method of fabricating a polycrystalline diamond material is provided. By varying the magnitude of the resistive element, the center damping frequency of the piezo-based device can be varied as needed for center bearing assembly and drive train. To find a misplaced unit, any other unit is procured, and its transmitter code associated with the missing unit is energized. 1 to 10 percent,K 0 to 5 percent,Sn 0. The HP Spool and generator maintain essentially constant speed and frequency, while the LP Spool responds to restore equilibrium.