A method and system for transmitting information included in a memory device to a remote location. The tool defines a volume for receiving material excavated from a hard packed substrate. The tag memory has a plurality of tag records pointing to cluster control blocks associated with the memory clusters for defining the segments. If the switching contract arrangement has several contact levers all of the associated contact force springs can be combined to form a one-piece leaf spring. A pair of tubular risers each having an upper roller therein at the head end of the frame direct arm cord ends to a cord retraction assembly mounted on the carriage. The engine includes a combustor.