Nice block FRAGN'STIEN!
I'm wondering if there would be much decrease in performance if we would use non-drilled tops (only the pins on the bottom). Might be interesting to experiment with that, as it would cut drilling time in half!
Now as soon as my exams are finished, I'll try to find some copper/brass (for cool tops!) around here (cheap) and I might experiment a bit with a few designs. I also have to complete my rackmount project, so don't expect a milion blocks soon heh