After many trials and tribulations, I finally have a keeper 27 iMac i5. Ive ordered an extra 4Gb of ram and I have few questions about the upgrade process. Does the ram slide straight in or is it the kind you put in at an angle and push down to lock? How much force does it take to click the ram in? Do I really need to flip the machine over onto its face or can I tilt it back to access the ram slots? Any advice is appreciated since this is my last big hurtle.