A switched loop RF radiator circuit, comprising a radiator element, a circuit RF inputoutput port, and a balun coupled between the radiator element and the IO port. The adsorption system delivers at least 5 liters per minute of concentrated gas component from the molecular sieve material in which the system has a specific total weight per LPM<9 lbsLPM. Optionally, the surgical kit may further comprised a third percutaneous instrument having an elongate shaft with a distal end and a proximal end connected to a handle, and at least three end effectors attachable and detachable to the distal ends of the percutaneous instruments. Non-uniform heat distribution resulting from the frictional contact between the bristles of the brush seal and a sealing surface on the platform along the rotor surface affecting rotor dynamics is thereby eliminated or minimized. The performance event signals are stored together as a single unit in the event register.