Just as you thought you had everything in the toolbox,heres a link to the ultimate device for those conserned about living under pressure :) http://www.kistler.com/do.content.sg.en-sg?content=211_CylinderPressure <http://www.kistler.com/do.content.sg.en-sg?content=211_CylinderPressure&res et=true> &reset=true