First 2 installments of Dunlop's wah documentary are up right now, with part 3 coming on 2/28/11. Pretty cool so far. Check it out here -


http://crybabydoc.com/

I agree (i'd posted a thread about this prior to yours), but hey, it's so good that it bears repeating anyways, heh. My favorite part was probably how it came to light--the "mrb" (mid range boost) on the amps switch cost 4 bucks; the sweepable potentiometer cost 30 cents. They took a volume pedal from one of the organs and put the midrange potentiometer in there instead, creating the wah pedal. Interesting that Clyde McCoy (a trumpet player) had nothing to do with it other than that they just asked him to use his name.