If you're prepared to put that much work into a block you'll get there in Cu...
Bit paranoid on the top retention were'nt you though?
...
PS. it was mentioned in the Lemon block thread by Brad, how abouit staggering the pins so the water does'nt take a straight path to the outlets?...
I don't think the temps tally at all. 26C and 33C load temp(7C rise), but 36C only giving a 4C rise!! (40C). it should be 10C at least!...