Was never impressed with the SAV-2. You can monkey with a 'bad' one for days and it will NEVER go safely under 1.5 lbs or so. Never experienced a 'good' one but people swear they are out there. On the other hand never had a bad SSS they all could go safely under 1 lb. without a bunch of malarkey. Trick on the SSS is not trimming the trigger bracket too far. If you trim it too far then the entire assy gets loose and the safety and overtravel adjustments get wonky sloppy. Just trim it barely far enough to get the screw in, good to go.