Went through this one to replace the clutch cover on my MBA. Went through it all with no problems. Would be nice if the guide showed removal of the clutch cover.
I successfully put an SSD (mounted in OWC data doubler) into the optical drive slot.
I got slightly thrown for a moment that at step 10, the iMac was apparently rotated 180 degrees. I didn't really want to change my work position, so I turned my iPad upside down to follow the pictures correctly. Not sure why the perspective changed at that point in the manual.
The other "interesting" task was reattaching the LCD, what with the nearby rare earth magnets trying to steal the screws. Having a heavily magnetized torx screwdriver was a big help; I just took a magnet of my own and stuck it on the handle end of the shaft, and then it held the screw enough to make the job possible.
I was quite relieved when my iMac booted after all this. :)
Unit turned itself off after battery ran down, about 10-15 minutes total. Got very toasty during that time; I opened it up to give it some air. After it shut down, I plugged it back in and was thrilled to get the "charging" graphic. Some 15 minutes later (or so), the unit came alive and now seems fine. Success!
I got a surprise when I connected the battery and the iPod immediately went into the white screen of death (yes, I had activated the "hold" switch as directed in step one). I could think of nothing else to do other than finish putting it back together. Right now I'm letting the battery run down and am crossing my fingers that it will come up afterwards.