I have built a few Bottlehead products over the years, and I always want to put a little 'stamp' on my work making it stand out in some way. This time around, I have thought of buying some decent square shaped wire for the ground bus. Trouble is, no one seems to have any around. What I do find is craft or jewelry wire, that I doubt is the best choice for electrical applications. Is there a source out there for square or even flat conductors?