Line up with your center screw (for single holes). Distance is determined by the depth of your vise. Spacing should allow you to tighten between the vise dog and a given bench dog within the travel of your vise jaw. My vise has about 10" of depth but I spaced my holes at about 6" although the first bench hole is 8" on center from the vise dog. This allowed the rows to criss cross from the tail vise row where crossing the front vise row. HTH.
Last edited by glenn bradley; 11-28-2007 at 03:58 PM.
Any sufficiently advanced technology is indistinguishable from magic.
- Arthur C. Clarke