4-Jun-2012 With two holes drilled in the floor using the match plate, we put dowel pins in the openings to keep the plate from shifting anymore for the rest of the holes. Although the welding pliers have a tight grip, their actual clamping force is weak compared to the side force the drill point puts on the match plate while drilling, the plate has shifted slightly when we drilled the dowel holes. With the clamps and pins in place the plate will not move around anymore.