Original design was used as a teaching aid to show electronics students distorted wave forms.
From this thread:
https://www.diystompboxes.com/smfforum/index.php?topic=28195I've included in the layouts the upgrades suggested by Mark Hammer. I've also added the ability to switch between four types of fuzz.
Layouts are for tagboard as well as vero.
I am also posting the original schematic since it's link is dead and I had to retrieve it using the Wayback Machine.