I DO NOT RECOMMEND ANYONE ATTEMPT THIS. Apple disinherited me after installing an Optibay anyways, shortly before kicking me out of the house when my warranty ran up. I have nothing to loose except my machine. THE PROJECT Browsing the great wide 'net one day, I stumbled upon CjPhan's Physical Ventilation Mod, which reminded me of the reduced fan speed/body temp I noticed while gaming without the back cover on. This set the gears of creativity in motion, ultimately leading me to perform surgery on my Macbook Pro via power tools. I used a 5cm circular cutting tool attached to a drill and bored two holes directly above each fan, intended to provide significantly better airflow to each fan. For protection, I cannibalized a crappy Sony headset for its metal grilles. I trimmed these grilles to size and taped the circumference to prevent short-circuits/physical damage from sharp edges. I positioned a section of the metal grilles over each heatsink, in an added effort conduct heat to each grille to further reduce temps. I tested temperatures using yes > /dev/null on tabbed Terminal windows to activate individual cores, then letting my Mac sit for 6-10 minutes to measure an average temperature with Temperature Monitor. Temperatures Before (Celsius, ±5 degrees): Idle: 65 1 core: 70 4 cores: 80-90 8 cores: 90-100 Temperatures After (same conditions): Idle: 40 1 core: 50-60 4 cores 80-90 8 cores: 90-95 Thermal Paste Replacement 8 cores: 85 degrees, fans idle less that 3500 Observations: Fans idle less than 3500. Nothing else to say. My poor abused Macbook Pro is almost inaudible no matter how hard I run it. Time to do some Handbrake encoding for hours and see if I can get the fans to go decently high.