The invention relates to a hollow structural connecting rod including a first end fitting, a second end fitting, as well as a hollow main portion situated between the two end fittings. A difference between a change in an encoder value per a predetermined time and a change in a linear sensor value is obtained as slip, and a running motor is controlled through a running controller to eliminate the slip. The center pin body may also or alternatively include a circuit member positioned inside the center pin and adapted to be short-circuited in the case of overcharging and to consume current. The lubrication apparatus further includes a lubrication system including a lubricant conduit extending within the anchor body from the distal pipe coupling feature toward an anchor body intermediate portion between the first coupling feature and the distal pipe coupling feature. The absence of the metallic catalyst improves the insulation resistance of the Cu interconnect pattern in the printed circuit board. A line detector within each tile supports reconcile and flush operations, and a line patcher in the controller provides for initializing address ranges with no processor intervention.