sight jig
Sirs:
That sight jig, no longer made was used by a fine gunsmith, Charles Shaner, of Barlow Ohio, The problem with it, that Mr. Shaner fixed was that the drill guides would allow the drills too much play. He made new guides and let them come closer to the work so that would'nt happen.
I've never used a guide but to align the holes with squares and levels. Especially with Mauser actions where the rear clip guide may not be perfectly aligned with the front.
Harry B.