There is a lot of interesting stuff here:
http://www.fostex.com/index.php?file=support/documents
Digital mixers, CD recorder, multitrackers etc, those with service manuals include circuit diagrams - 208 pin chips in some cases! Could be the answer to the ultimate fuzz box.
DAMMIT!!!!!!!!! :x
You had my hopes up for a second there... I've been trying to find a Fostex 460 manual for YEARS now!