Aspects of a current controlled motor amplifier system are provided. The unit having first and second spaced side units defining an opening there between. The stint is molded from a sheet of plastic material with the indentations being formed by an abrading process such as abrasive blasting or the like. The second thermally conductive grease thermally couples the first heat sink to the second heat emitter. The invention also provides new chiral intermediates useful in the production of pregabalin.