Oh I don't mind the 3 hours it took to completely remove the thermal gel for the Radeon's memory chips.
Would explain why my dad's iMac kept overheating and creating artifacts. Now the GPU runs at a cool 25 deg C along with the CPU. Maximum load only reaching 39 deg C currently.
Furthermore, just taking the heatsink off voids warranty. So since we forgot to buy AppleCare after our 1st year is up, might as well.
The CPU is removable.