The pin in the c clamp is a piece of drill rod 3 /32" x 1 1/2" long, permanetly fastened into the top jaw. On the opposite side, put the lock plate on, just so it is there. Placing the moveable jaw that is padded on the side plate now has a solid place to rest when you apply pressure to the clamp to move the top lever shaft.
Nautrally a small hole, 1/8" has to be drilled on the other side near the bottom of the top lever and centered on it.
I tired it the way Hunter did and one slip and you gouge the metal and wood, but then again that is what they did day in and day out.
