BlueBall, very impressive indeed... looks like your really having a good time at it as well (thats really whats it's all about). I have a question. I have been thinking of making hard drive water coolers for some time now. The one that you made, is it just attached to the drive? or are you using some kind of "goop" <--- (highly technical term) in between? more suface contact = more cooling. I know that Koolance has watercooled HD kits and they come with some stuff that you put on the drive (kinda thermal paste on steroids) but it looks messy, and permanent. As I have my own business (not computer related) I do have a complete machine shop at my disposal. so the actual manufacturing part won't be a problem.