Here is a mod I did on one of my 2011 minis (but use it now on my 2012 2.6 quads). I have some spares so I could take a risk on cutting the black base. It put the base on my 2012 2.6Ghz and ran HandBrake for a while on a HD mkv on AT3. It gave me about a 4-5C drop in my peak temps. Base temps appear to have dropped but that is hard to tell because it fluctuates too much. I basically used a box cutter (with a few spare blades), a 10mm drill bit on the corners and the edge of the blade modified in a compass to cut the curve. Just kept following the cut line. Eventually it creates a groove and its easy to cut the black plastic. Took about 30 mins to do the cutting. Then cleaned the edges and used double sided tape and some black mesh from a car window sun shade. EDIT: I forget to mention that I use this mod with the mini on its side in a Newer Tech alloy side stand. It wouldn't work obviously if the mini is left flat.