I thought that this was a pretty good read:
http://www.coolingzone.com/Guest/New...hermacore.html
Oh, and a little something for your troubles:
Still not wild about that "T"; thinking about reworking it so the water flow is straight through. Reasonably neat tho, eh?
Yes I am (keenly) aware that all my phaestus.procooling.com images all over the web are "red x's". Meh