An LCOS display, including specially manufactured spacers, and a process for making the display, are disclosed. Large vibrations of the frame from an impact of a strike on the rim are transmitted to the second plate, and the rim sensor provides an output corresponding to the striking force. In one embodiment, two or more MEMS inertial sensor sets are installed in the IMU. When resident in the flash memory chips, a single ALU or multiple ALUs may be used.