I've got you now. It is the CPU inlet, correct. That must be what Quietice means. I just hadn't thought of routing it through there, and looking back at the design, I could do this. The tube would simply go on top of the rad fans where clearance isn't a problem. I would have to use two or three 90s to do so, but that is no big deal to me especially since I am looking at having 2 pumps. It just had never crossed my mind to do so. Its funny how you can look at something so many times over and never have something this simple dawn on you.

Very interesting idea. I'll have to draw it up tonight in Sketchup.