An actuator for use in installing or extracting piles and the like has a common member supported at and having jaws for gripping a pile. The system includes a swivel shaft connected to the propeller to turn it relative to the boat, a swivel case fixed to the outboard motor and rotatably accommodating the swivel shaft, and a hydraulic actuator connected to the swivel shaft to rotate it. Implantation steps then provide p-type channel-accommodating body regions in the active area and p-type regions in the inactive area, and then source regions in the active area. The leashes retract independently of the other leashes, such that a dual leash may be used to walk one subject. Unique technical identification codes may be used to establish relationships among document. Since the agent trade server is working closely to the deterministic core of the trading system, it is preferred to co-locate the agent trade server with the core of the matching system.