Cathar, I am seriuosy glad you figured it out finally!
Benefits are quite phenomenal there. Massive increase in coolants velocity with increased pressure combined with substantially higher water to copper surface area. There's one more problem here. It's 3D design of a block using pressure force and velocity increase effects. All I can say is that there's a compromise to be struck here between an amount of coolan't molecules being in contact with copper in any given time, restrictiveness and spot cooling technology. I got inspired by foamed graphite cooling tech
Keep digging m8! You are so close (or maybe you are there already???)