Feel free to print it out. That design never quite lived up to my expectations, but I did get a lot of practice soldering it together.

My inspiration for the Tower of Cooling Power was the article you linked at overclockers.com. I thought the added fins and chimney would improve the cooling.
I'm not sure of the thermal output of the Athlon, but the undervolting made about a 4 degree CPU temperature reduction. If I remember right, I went from the stock Vcore of 1.65 volts to either 1.50 or 1.55 volts. Check your BIOS to see if you can do it on your motherboard.
I've been considering adding another 10 foot length of copper tubing to the loop. Right now, the 8 foot length is cut into two 4 foot pieces, joined with elbows on one end, so it takes up a space of about 4 inches x 4 feet behind a desk.
We're getting close to heating season in Wisconsin and my tubing is running near the baseboard hot water register since I moved it a couple of months ago. I need to see how the temperatures change when the heat goes on. I've been wondering if more tubing = cooler temps.
Joe