Vastex VRS Pin Registration System - Manual Press VRS LiteWorks with ANY exposing unit and ANY rear clamp manual press. The Vastex Registration System (VRS) is an ultra fast and accurate pin registration system that enables anyone to locate positives onto the screens off press then locate the screens onto any rear clamp screen printing press with all colors in register in 4 easy steps: Attach your positives to setup sheets in register, using the alignment grid pinboard Locate and attach your positives in