[Fixittt]

v12,

The channels are not as smooth as you would think. And I can say, that if a block is done right, there should be nill for heat at the top of the block. (as the rest of the cooling system should be up to par as well) So a copper top is not needed. and as for the randopm dimples on the bottom, I cant see them doing much for preformance, unless the whole bottom of the channel was cut extreemly deep. (See #rotors block design) where you have most or all of the water flowing thrue the dimples. Then you come to machining costs. I dont know aobut you, but I dont think people want to pay much more then what water blocks are selling for right now. And an extra 5 minutes on a cnc machine, will add that much more to the price of the block.