The apparatus in one embodiment may have capacitive bulk acoustic wave disk gyro operated in a closed loop mode. Provision is made of a test signal generating device for generating test signals used to test the data storage medium. The grip member may include a pusher and an elastic member. Several of the analogs are demonstrated to have a superior cytotoxic activity as compared to epothilone A or epothilone B as demonstrated by their enhanced ability to induce the polymerization and stabilization of microtubules. The exemplary methods, circuits and devices address fault conditions such as over-charge, over-discharge, over-current, over-temperature, etc. Unsnapping the decorative cover exposes the switch assembly so it can be removed from the mounting bracket.