I have been having a somewhat difficult time putting my small holes exactly where I want them. I would mark the spot with an "X" with a sharp pencil and when I would tap it with an awl, the dimple is "off" a little bit. Not enough for anybody to really notice but when I look at it with a loupe, i can see where I miss the lines a bit.
Well, I finally ordered the Optical Center Punch from Lee Valley and I can tell you it is a fine measuring AND marking tool. You line it up with the crosshairs and replace the optical with the punch and you have a perfectly placed crater for your brad-pointed drill bit.
It is in new catolog on page 140.
Gary K