hmm lemme clarify... i was gonna use sumthin like a o-ring and have it in a notch in the plexi. then drill out holes in the bottom of the block and MAKE SURE THEY ARE FLUSH WITH THE BOTTOM!!! I must keep that in mind. and the o-ring and screw/bolt idea should keep it water tight. the is a clear case. dont want some ugly copper box on my CPU.
www.swiftnets.com go there. and look for MCXC370 isnt that a sweet looking heat sink? why cover it up?plus glowing UV reactive coolant running between the pins would look sooooo cool!