WARNING: I do NOT recommend anyone try this unless they know EXACTLY what they are doing and the potential consequences. This is a follow-up to my previous post, now with updated results and analysis in hindsight. I chose to do this because i know that if any trouble arises, I can just buy a new back panel. As you can see, the ultimate test is temperature: in the end, the computer only runs 2-3c cooler than normal under maximum load, a small difference. However, I do not believe absolute maximum-load, fans-screaming is an accurate assessment. The biggest difference is the vastly reduced fan speed while doing simpler tasks: Playing light (Minecraft) to mildly intense (Roller Coaster Tycoon, Galaxy on Fire) to very intense (Metro: Last Light, Battlefield 3) video games used to result in fans that were almost as loud (if not more so) than the game itself. Now, aside from occasional bursts, the fans only produce a comfortable low hum. The biggest technical concern is the fact that I severely disrupted Apple's excellent thermal design - those fans are designed to draw air through the chassis to cool the rest of the internals. Now, the fans (unless the computer is on a flat surface) directly cool the CPU/GPU, causing an increase in case temperature.