I'm planning to build a watercooled system soon. I was thinking about using all copper tubing instead of plastic hose. I have noticed that nobody has mentioned doing anything like that. Is there anything I should know about this before doing it? I plan to cool the inside of the case, and insulate it, the tubing would run from the proccesor to the radiator and back, all inside the insulated area. The power supply would not be in the insulated area. The temps. inside the insulated part of the case would stay below ambient.