The Imac was starting to take that spin around the drain. The Hard drive would work and then the next day would fail. So it was time to replace.
With your step by step guide and great videos it was easier than i expected. I was really nervous going into this one but once i took off the glass with the suction cups it was a walk in the park.
Take your time label and keep track of where the screws come out from and use a little know how with IFIXIT as the guide you can do it. I did my research from advice from the video and other people that performed this repair. It made it a lot easier on to the next repair.