Hmm...I'd like to know too shadow. Didn't even know you were doing that. If so I would be very interested. I thought I would have to put water coolling off till this summer when I am working real hours again but at that price I might be able to scrape up some cash to do it now.
Thats wicked cool of you to be doing that for just production costs (I figured at that price you were barely charging anything at the most). But if you say they are easy to do maybe I'll just give it a shot myself instead of taking up your time.