Aligning A Vise on a Mill

[rgsparber]

I like the concept, despite labor intensive set up. How about something like a sine bar with extended rolls, in center to center distance wider than jaws, and a bracket/ vee block post?
I'd want the bar section protruding above vise jaw, suitable for indicating too.

The sine bar would be an improvement. It should be placed on the movable jaw side of the vise so it doesn't add error. The labor-intensive part of this for me was setting up the "nest" to prevent the pivot pin from sliding around.

Rick