The Smooth Shooter has twin springs, in 1 spring mode it supports up to 10 lbs, in 2 spring mode 18 lbs. The Smooth Shooter vest, arm and Glidecam 4000Pro are in excellent condition as they were only used for a 2 day corporate project. Since then they have been carefully stored with un-tensioned springs. It still has all original parts, weights and manuals. The vest and stabiliser combination is far superior to hand only stabiliser use as they are far less tiring and the arm isolates the camera from body movement, although if required the 4000 can be operated as just handheld. Also batteries and monitor can be mounted on sledge for professional use.