Two main factors are explored in this paper to improve device performance by reducing parasitic damping: box cross section and box material. First, two box cross sections are studied to determine their effect on performance. The cross sections are shown in Fig. 3 and consist of a box with a guide rail and without a guide rail. The guide rail is a 0.5 mm radius extrusion that runs the height of the box. In the box without the rail, the corners were removed so that Fig