Lightweight cam clamp works like a champ
When facing the plywood edges of a chest, rather than wrestle with the glue, edging, and heavy clamps all at once, I decided to make a set of lightweight cam clamps from scrap I had on hand.
To make one, first determine the length of the clamp bar by measuring the span of the pieces to be clamped, then add length for the stopblock and cam lock on either end. With the stopblock mounted and the clamp bar held in place against the workpiece, mark the mounting hole for the cam lock on the clamp bar 1" from the front of the workpiece. Shape a cam lock using this pattern, and mount the cam lock to the clamp, as shown, with a small screw.
—Orville Tutor, Ecru, Miss.