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  "notes": [
    "Archive described by publisher as polygon reduction rate 99%.",
    "Original OBJ comment headers retain CC BY-SA 2.1 Japan text from 2013. Official live English license and README set CC BY 4.0 in 2025. Original downloaded meshes are unchanged.",
    "Near-duplicate left pelvic-floor pairs share nearly identical bounding boxes. For one-per-muscle rendering, use FJ2542, FJ2544, FJ2545, FJ2546 and omit mirrored M alternatives.",
    "Position welding QA rounds positions to 0.0001 mm; reported counts are diagnostics, not modified meshes."
  ],
  "modifications": "Position welding, Loop subdivision, normal recomputation, axis conversion (-Y,Z,X), uniform scale, translation, clipping/cut surfaces, schematic bladder distension and motion. Urethral centerline fitted from mesh geodesic bands; segment boundaries and radii approximate."
}