I have an old but very useful laminated beech workbench top. It has plenty of holes for bench dogs -but - all the holes are 9/16" dia.and most (all that I can find) bench dogs are 3/4" dia. or square. I would like to redrill the holes and would like some opimions on how to go about it to ensure the holes are accurate and squate in the top. Drill press is out since the top is too large and heavy. Any ideas?