Really nice to see some proper engineering going into a case. The workmanship looks excellent. You are very lucky to have access to that kind of equipment, i am very jealous. I'd like to see you make some custom waterblocks. I think with a bit of though and creativity you could come up with much higher flow blocks resulting in the better flow throughout the system and a better vortex. At present the water has to chage the axis it is flowing in very abruptly upon entry and exit of the block. Perhaps you could design a block that has the entry and exit in the same plane as the block creating a faster and more efficient flow through the block. It would also allow more resistance to be provided around the critical areas of the block (directly above the core) by increasing the surface area present in the flow.