Just follow the instructions step by step and take your time, it all worked - it took me four hours but I moved very slowly and cautiously. Two things worth mentioning:

- Somewhere I read a note from someone who suggested using a guitar pick for working around the edge of the case to get it open. Turned out to be an excellent idea. The guitar pick plastic is a little softer than the case so there is no chance of nicking or gouging the case.

- The three screws along side the optical drive are deeply recessed. A magnetic screw driver is a necssity.