{
  "id": "P09-48",
  "verified_holes": 48,
  "rows": 4,
  "cols": 12,
  "max_opening_width_error_mm": 7.629394552566282e-06,
  "max_opening_depth_error_mm": 8.526512829121202e-14,
  "max_section_area_error_mm2": 4.361469673597185e-05,
  "same_four_depth_rows": true,
  "height_unchanged": true,
  "projection_change_mm": -0.3300018310546875,
  "mount_grid_valid": true,
  "model_sha256": "55055a6e4bed5b69e17deea6039441abfad465106e7c3446daa7d82cfab440a6",
  "current_peg_fit": {
    "config_sha256": "9c7be3cc7807ffba69a6a0a23e5344289850f5fce4b22a75fd9313b035de0d65",
    "canonical_source": "reference/peg-fit.scad",
    "variant": "rear-tongue-3p80-interference0p05",
    "board_grip_assumption_mm": 3.8,
    "source_board_assumption_mm": 3.94,
    "clearance_at_assumed_board_mm": -0.05,
    "predicted_clearance_at_3p94_board_mm": -0.1900000000000001,
    "tongue_run_mm": 5.0,
    "tongue_rise_mm": 3.3,
    "tongue_angle_deg": 33.4248111826038,
    "previous_tongue_angle_deg": 30.96375653207352,
    "elbow_center_y_mm": -2.578176717793985,
    "lower_locator": "Exact baseline lower locator, unchanged; designed for 3.94 mm board",
    "construction": "Canonical cylinder/sphere upper core and exact 120-degree cylindrical lower bearing segment. User-authorized parameter revision.",
    "scope": "Intentional interference: negative clearance requires plastic/board compliance. Assumed board grip, not measured thickness. No force or recoverable deformation claim.",
    "baseline_sha256": "f030d59fc8130b57cfcb4367202cdd0e03a1c335850f33fa41d28e85eb623d96"
  },
  "fit_revision_note": "Mounted CAD updated globally. Earlier fit, motion and slice evidence in this document is historical; current geometric verification is peg-fit.json."
}