Okay, back again, while im deciding what type of Alembic to order, maybe you can help me identify what type of electronics did John Entwhistle have on his main spyder 4 string with the cone headstock? I know that he had the series 2 set-up, but if you look at the pics, on the lower horn, there is an additional knob and switch, adding up to 6 knobs, 1 pointer rotary, and 3 toggle style switches. Can anybody id those additional knobs?