Hi,
I'll check this at home, but I had the idea that some of this came from the "lute" and other string instruments that have hundreds and thousands of years of life.
I take it this is strictly the electric guitar?
Strange ... I keep thinking that the development of the instrument from 3 to 6 strings over 1000 years would be more interesting, since it would go via many other cultures and European history specially in Italy. I may be incorrect, but there is a story or two that the gypsies in Europe are the ones that kept the "lute" alive and hidden from a certain group ... for hundreds of years ... etc ... etc ... etc ... and I kinda like that history better, but will definitely take a look at those two things.