An external AC power adaptor having an additional compartment for cooling. The rear face of the brush seal carrier is coated with an anti-friction coating, thereby allowing movement of the brush ring seal device within the packing case. The IO hubs are also coupled to one or more processors via direct point-to-point communication links. A third material supply bridge is then moved over the worktable to apply adhesive on the sheeting in a pattern mirroring the steel frame. The tread ring fits onto the outer periphery of the spoke structure. The allocated storage capacity is managed according to a management policy so that the allocated memory is not overwritten, data is not backed up to the same physical device, etc.