I have already put several such bags on stones under acceleration from 3770K and 4770K - to modern ones. For the money - it copes perfectly well, there are no complaints, there is not expensive thermal paste in the kit. I never fooled around with leveling the "heels" - I set it as it is - everything works fine, the temperatures are normal (I had a maximum of 82-86 with 4770K and 4.5 GHz) it works quietly - the quietest cooling element in the case. I used to fool around with dropsy, then I realized that it makes no sense, the noise is the same, the temperatures do not differ critically, I switched back to the air - it became much easier and faster to assemble and you donβt worry that something might leak.