Yeah, this was an interesting little test. Really proved a point to me: leave no stone unturned. Going forward with my second roundup, I'll definitely try to eek out all the performance I can from the various blocks (within the normal means of an end-user....I won't be machining into the blocks or anything like that).

I already have 2 modifications in mind for the GTZ, and concocting some ideas for the Supremes/HKs/CPU-350.