Posted on April 21, 2023April 24, 2023 by Dale Phillips Letter: Vacuum Clamp Letter: Vacuum Clamp by David Haxton Originally published in American Lutherie #67, 2001 GAL: I share Jon Calkin’s enthusiasm for the dished workboard (see AL#65). I know it’s made my guitars better. But he could trade all his clamps and dedicated workstations for a much simpler and, I would say better, solution: the use of a vacuum pump. You get absolutely even clamping pressure across the entire face of the plate and no dents from over-tightened clamps. In fact, I preshape and sand all my braces before gluing, lessening the need for chisel work after glue-up, and the whole procedure is quicker. I’ve also used my vacuum pump to make radiused sanding blocks for fretwork and laminated linings, and they make great hold-downs. My pump came from a mail-order surplus supply company for about $80.