Followed these instructions to install a new SSD drive and it went perfectly. My only suggestion for improvement might be that steps 6-8 aren’t necessary. After removing the vertical synch cable, I was able to raise the display enough to remove the hard drive (and re-install the new SSD drive) without having to remove the cables as described in steps 6-8. My take on it is that the fewer cables I have to unplug and plug back in the smaller the opportunity for damaging something. I have not had any issues with the fan either. I dropped in a couple of 8GB sticks of memory to replace the 2GB ones that came from Apple. The new SSD drive and the memory upgrade makes for a much faster machine. Thanks for the instructions!