Start with the neck. The tech adjusts the truss rod until a notched straightedge shows the fretboard dead flat, then marks every fret top with a Sharpie. A leveling beam with adhesive-backed abrasive runs along the frets until the marker is gone from all of them. Then crowning: a concave file reshapes each flattened top back to a rounded peak, keeping the centerline where the Sharpie line still shows. Polishing goes through several grits and finishes with steel wool or micromesh. For a refret, old wire is heated with the iron and pulled with flush cutters, slots are cleaned and sometimes deepened, and new wire is pressed or hammered in and clipped.
Footage comes from a head camera over the tech's eyes and two synchronized fixed cameras, one looking down the neck and one across it. The head camera catches what matters here, which is the angle of the file, the rocking motion checking three frets at a time, and the quick look at the straightedge between passes. Recording runs through entire working days, so the dataset includes the breaks, the second guesses, and the occasional fret that gets re-seated.
Each instrument becomes an episode. Steps are segmented and labeled the way a luthier would describe them: truss rod set, marking, leveling, crowning, end dressing, polishing, string up, buzz check. Buzz checks are tagged pass or fail per position. Tracking of the hands, the file, the beam, and fret positions is available on request. Everything is delivered in your schema to your own storage.
Workers are consented and paid, and the footage carries full commercial model training rights. If you want to see one, ask, and a sample ships within a business day.