The anatomy of a 'bow'.

[serialk11r]

Ok, but what if the CPU was lapped 100% flat, and the Base of the waterblock (fuZion) is lapped 100% flat? Since we now have 2 100% flat surfaces, would you want to introduce a "BOW"???

There are no 100% flat surfaces, and when you mount the block onto the board...who knows what could happen to the base.