For Frith's early unstructured music, as with Henry Kaiser on "With Friends Like These", and his early table-top guitar solo performances, he used a homemade six- and eight-string double-neck guitar created by a friend, Charles Fletcher. Frith told "DownBeat" magazine in 1983: "It was the one and only guitar that he ever built ... he constructed it mainly out of old pieces from other guitars that I had, and for the body I think he used an old door." The possibilities offered by homemade instruments prompted Frith to start creating his own guitars, basically slabs of wood on which he mounted a pickup, a bridge, and strings stretched over metal screws. "The basic design of the instrument is supposed to be as rudimentary and flexible as possible," Frith said, "so I can use an electric drill to bore holes into the body of it to achieve certain sounds ... ."