Yesterday's informative query about the Big Muff Pi and all its incarnations was really interesting. Last night I got into some research, and found an absolutely amazing site dedicated to the Big Muff Pi.
It is:
http://www.kitrae.net/music/music_big_muff.html
There is a LOT of information here with tons of pictures, and a very detailed history of EHX. I can't vouch for the validity of the history, but the pics themselves are a goldmine.
No affiliation, etc.
(If this has been mentioned before, please forgive. Yes, I searched here first to see if this site has ever been mentioned, and found nothing).
Tim