I just ran across this thread today and I am BLOWN away. This is some very cool custom work.
I'm embarrassed at my setup now. I've been using a 350gph pond pump in a 5 cubic foot freezer with a mixture of glycol/water through a Z4 waterblock. Condensation is a pain, but it does the job.
I'm amazed at where you have taken this project.
Good luck bro and keep on going.