Fell across this link at FSB, on a discussion bout Yerasov fx.
http://fileshare.eshop.bg/browse.php?id=5
A whole bunch of stuff here. at the bottom you´ll see a folder called "yerasov" - about 15 schems of his fx.
haven´t seen all, but seems to be some interesting thingies :)....
Those look like pretty complex circuits! But i'm really curious about that 7000volt overdrive!! hahaa