I'd assume you've already seen, but just in case.......

http://si.shimano.com/php/download.p...0A-002-ENG.PDF

And I know whilst looking around about my 6800 brifters that there was a "service" portion of the manual (which probably wouldn't help you much) but I thought it kind of funny they actually considered "servicing" brifters. I know I wouldn't DARE start pulling one of these puppies apart cuz I'd surely lose parts.

Like taking apart a complex carburetor!