You're right I should've add that too.
Anyway the base if a full copper baseplate from my Swiftech MCW-462BTEC that I don't use (I use the non-TEC plate) of 90x90x5mm. The maze is made with 500x15x1 mm copper plating soldered to the copper baseplate with sanitair solder (tin/silver solder for best heat-conducting). It is closed down with a plexi-glass plate with some rubber between the plastic and copper.
Here is a pic of it in a test system with a 152W Cooltech peltier on max with the (crappy) isolation removed after I blown on it a couple of times: <A HREF="http://home.kabelfoon.nl/~svo/newwc/Brrr-ice.jpg" target="_new">Brrr... condensation turns into ice</A>
The lowest temp I got with this setup with the crappy isolation (I didn't had anything else) was 21 C on the hot side against the waterblock and -19 C on the cold plate against the cold side.
My dual-PSU PC is so powerfull that the neighbourhood dims when I turn it on