Methods for controlling the net-displacement of a rotary fluid pressure device are disclosed. The interface assembly includes a flip chip bonding pad having a region for performing the bumping process. An edge portion of an interior lining is aligned with the striker pin and fed onto the tongue and into the latch groove against the spring pressure on the latch pawl, and can readily be removed by levering the actuator end part to unlatch the pawl from the striker pin. Users receive real-time wireless prescription dosing reminders based on their prescribed drug, dosage, and other indications, tailored to each individual’s daily schedule.