Working on some new extrusion slices for our Etsy shop. I have to drill a hole in the face of the slice at the top and needed to do it fairly accurately.
I made some fences on the drill press x/y table (actually an old Palmgren x/y rotary table, be jealous.) with steel parallels. Found the edge of one and moved over to the theoretical centerline of the slice.
Because I didn't have that much travel I used a 1-2-3 block to pick up the location of the other fence and moved the spindle to exactly where the hole needed to be.
The slice placed in position, it was easy to repeatedly drill the holes in the right place.