> So grenade - 1000rpm = safe limit ? I would say so. However, how are you sure what grenade is? Blow one up and know for sure ::grin::. -- Frederic Breitwieser Xephic Technology 769 Sylvan Ave #9 Bridgeport CT 06606 Tele: (203) 372-2707 Fax: (603) 372-1147 Web: http://xephic.dynip.com/