I've been reading this thread but not contributing cause alot of this talk is way outta my league. But at this point i do just want to say that this is definatly an awesome job done by you cathar (and everyone that has helped you) and that you should fully make your money back for all the time and effort that you have put into a project like this. Thank you for pushing the limits for us in the water cooling world.
slayher
P.S. i would be interested in your blocks but right now i'm pelt cooling, which i dont think would work right with your block