A method for maintaining consistency for IO operations on metadata distributed amongst a plurality of nodes forming a ring structure. A sleeve that defines a sealed cavity having a loose incompressible material inside covers the mounting location on the casing. The second N-channel MOS transistor is set in an ON state by the level of the storage node. The method includes selectively designating haptic events to the events based on the event scores in one or more selected channels, wherein the haptic events are output by a haptic actuator. The systems are modular so that various constructs and configurations can be created and customized to a patient. A sleeve element may extend around the dielectric element along sides of the dielectric element.