Step 24: Tighten the screws and DONE!
Once you have all screws in their places, make examine the position of the aluminum cover and tighten the screws and some moderate amount of force and you're DONE. At this point you may start your computer and migrate data from your old Hard Drive (instructable on that coming soon!) or install a fresh copy of operating system on it, but that's a topic for another instructable. Cheers!