Exact tuning + Consistent tone
https://youtu.be/JcyyYyuExzg?t=12m52s
The Zero fret was invented by the great German Luthier Hauser around 1934 https://www.siccasguitars.de/shop/guitar/hermann-hauser-1934/
21 features out of the box on AG Simplicio
https://youtu.be/LaZ4mcFKtVQ?t=2m
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Zero fret vs the obsolete bone saddle
https://youtu.be/UycPxN4Uvec
