Patent ID: 7472493

Claim:
An apparatus for locating a site on a first side of a workpiece in substantial register with an aperture located on a second side of said workpiece; said aperture being substantially oriented about an axis; the apparatus comprising: (a) a first locus-fixing structure configured for effecting said locating; (b) a second locus-fixing structure configured for cooperating with said aperture to substantially fix said second locus-fixing structure with respect to said axis in an installed orientation; (c) a substantially rigid connecting member coupled with said first locus-fixing structure and said second locus-fixing structure; said connecting member situating said first locus-fixing structure and said second locus-fixing structure substantially coaxially with respect to said axis in said installed orientation; and (d) at least one additional support member coupled with said connecting member for providing substantially rigid adjustable support between said workpiece and said connecting structure in said installed orientation.