I am going to try and make a gpu cooler the same way lee has doen his cpu.
Main body would be made from acrylic, with brass tubes as inserts.
A copper base would be attached to the bottom, and a 2mm piece of acrylic will be glued to the top. for barbs I will just use brass tube, with hose clamps done up really tight.
Water comes in central inlet in a 9mm tube, goes out two side in 7mm tube.
View from above:
view from below: