ermmmm apparently selarc, you haven't been here long enough to know who's aleck and what he's doing now do you? And to your question, yes he is and a very accomplished one and a very long time contributor to LYN's extreme cooling community. See that avatar of his? It's a waterblock which he designed, built and sold to us.

And for the Aluminium Vs. Copper issue, here's a quick explanation of the pros and cons

# Aluminum. It has a thermal conductivity of 205W/mK, which is good (as a comparison: steel has about 50W/mK). The production of aluminum heatsinks is inexpensive; they can be made using extrusion Due to its softness, aluminum can also be milled quickly; die-casting and even cold forging are also possible. Aluminum is also very light (thus, an aluminum heatsink will put less stress on its mounting when the unit is moved around).

# Copper's thermal conductivity is about twice as high as aluminum - almost 400W/mK. This makes it an excellent material for heatsinks; but its disadvantages include high weight, high price, and less choice as far as production methods are concerned. Copper heatsinks can be milled, die-cast, or made of copper plates bonded together; extrusion is not possible.