Here is the raw copper for the waterblock. The thick 1/2 inch piece pictured will not be used. It will be replaced with another (better) piece of identical thickness. The block will be assembled in 3 vertical pieces (stated in first post).
Just imagine another 1/4 piece of copper on the bottom, with the hose barbs drilled into the sides at 45 angles. This lets me "play" with my center "core" slug. I do like the design posted by airspirit. Very good idea, thanks for the contribution. I'll do it a little more curved than the square though. Im planning on drill pressing out the base of the water channel, so ill just use the circle curve of a drill bit to make the center "thingey" more unrestrictive.
any other ideas?