There is provided an apparatus for producing a cross-sectional angular surface along a substrate, such as a flexible electrostatographic imaging member belt. Then, the invention includes computing updated versions of the plurality of objects and atomically publishing the updated versions wherein the updated versions are not available until after expiration times corresponding to previously published versions of at least one of the plurality of objects have elapsed. A cavity is defined between the trailing edge pad and the trailing portions of the leading edge pad. The grab rail is provided with left mount holes and right mount holes serving as a mount portion used to attach the grab rail to the seat rails.