940 rebuild... should I?

Excellent. I can build computers all day long, and there's a few moving parts there, so I guess as long as I take it all apart in order and put it back in order the same way with the aid of books and the occasional YouTube video, I really should be able to do this.
I took pictures and bagging stuff up and label them but actually when I was putting it back together I was kind of laughing thinking that really these things can't go in any other space then where they go. But take every precaution you'll be fine.