Left a comment in the other area too, I used this guide and another linked to it to replace both an HDD and the Superdrive. Perfect Instructions - I was daunted by this task the moment I opened the iMac, but these instructions made it doable. I also replaced the HDD and the Superdrive while in standing position. All I needed were a bunch of Pill Bottles for the screws, my cheap precision ratchet screwdriver set which had the proper size Torx Screw Bit, and an old iPhone Toolkit which had the rest of the things I needed. I used a Palette Knife to remove the sensor. The hardest part is getting the Screen screws back in, because the magnets make it difficult. I can probably do this now with other Model iMacs- This was the second iMac I used your guides to replace the HDD, this was my first Superdrive. Thanks a LOT.
Replacing an HDD was easy as PIE compared to this, the replacement Superdrive's holes did not line up the same way the original did. The original was a Sony drive, the replacement was made by H-L. But the shape was the same. By holding the bracket in place with my hand I was able to worm two screws in sideways until the pressure lined it up, then I was able to get the rest of the bracket screws back in. I had to do that while making sure the little tabs in the front of the drive were orientated properly - And not messing up the silver tape much. After that it was all relatively easy. The instructions were spot on and for the exact iMac (11,1) I was working on. The replacement Superdrive works perfectly despite the Brand change, I installed Bootcamp to make sure- It read and installed from my Windows 7 install DVD, NO Problem. I set the monitor screen in place without screwing it all back in just in case I had to open it back up again, not needed. Thank you SO much for your easily understood instructions.