I bought a new Mini Mac and did the upgrade myself of memory and the hard disk. It went OK, but it was hard to get some leverage on the memory chips. It all went well, but when I snapped it back together, one of the small black corner screws fell out! Oh, well, try it anyway. It works fine! I saved the screw and may install if I ever have to go into it again. I just didn't have a magnetic screwdiver that fit into that corner! Thanks for your great breakdown article!

Mike K