Bought together with a Samsung 830 for my Macbook late 2008 (1 Alu) my Caddy. I asked myself what many screws are doing. I do not know to this day, because there is no manual included etc.. I have installed the caddy according to the instructions of ifixit.com, runs flawlessly. One should mention that TRIM only works with original Apple SSDs to this function to bypass the App "Trim Enabler" install (self-explanatory).
