Tungsten E dissection
This guy needed to improvise a fix to his T|E's down button and documented the work. Nice pics, including one shot indentifying many of the main components. I've been inside mine before as well and would like to emphasize that getting the case open is
tricky! Be careful if you attempt it!
Guts and technical details of a T3
And this fellow is enamoured of his T3 and describes the technical details at some length. He also gives detailed instructions for opening one up. Interesting reading.