it was my great fortune to have once met and had the oppurtunity to play with Mance Lipscomb at a small coffeehouse in College Station ,Texas.He was a very kind and generous old gentleman.In his late 70's he had the fastest hands I think I've ever seen.Played bottle-neck with a little pen knife ,that he held between his little finger and his ring finger.His guiter of choice was a Harmony Sovereign.He sure got sime wonderful sounds out of that cheap old guitar.