I work for a manufacturing company, so have access to various materials. I made a plate out of 3/8" steel that bolts firmly to the bench top. A second plate is welded vertically, that bolts to the face of the bench (gusseted on both sides). The vertical plate is located about 3-4" back from the front edge of the horizontal plate to allow full handle movement. Coupled with a pretty stout bench, I experience no flex what-so-ever.
Kaiser Norton
