I took my Macbook to the local apple store and after they charged me $60 to "look at it" they informed me that they could not fix my damaged fan because it was considered a "vintage" machine, in other words, older that 5 years. I could have saved that money from the get go...
The repair was a cinch... Just followed your guide and in less than 15 minutes I had my mac running. Next I'm getting the keyboard top cover, mine is looking nasty.
Just follow the guide and tape on a post-it the screws with the guide step number. Another thing, make sure when you place the top cover to secure firmly the trackpad cable.... You don't want to redo the screw to often.