Methods and systems consistent with the present invention provide a Supernet, a private network constructed out of components from a public-network infrastructure. The first tier is a universal graphical user interface which can operate on any inexpensive computer as well as on an expensive workstation, i. A smooth sheet surface coating of fabric or plastic is attached to the section of the elastomer which contacts the central console, so that the blocker slides with the seat as it moves forwardly and rearwardly.