Been lusting after one of those old Kreg pneumatic clamps but they are tough to find. I bought this spring-return cylinder for $20 on ebay. It is held in place by two copper pipe stand-offs but it could just as easily be mounted with a couple of wooden supports. I liked the pipe clamps because I can reposition the cylinder if need be. The rubber foot came from frightprops.com I bought a foot-controlled valve for $10.