Haven't found any manuals per se, but poke around these sites for useful info ...
http://www.ozebook.com/compendium/techbuls/index.htm
http://www.ozebook.com/compendium/t500_files/tech.htm
http://www.ozebook.com/compendium/maps/documents/24.html
http://gt500.org.uk/
Anxiously awaiting your build thread! I posted a build thread, but I'm trying to finish my XV750 before I tear into my T500.