I made my own motor cooler and it works great. I've used it all summer and it is still going. I think it is cool that someone is making coolers for people who don't want to make thier own. I don't think it is cool for the same people to come on here and try to scare
the people who want to make thier own. You don't need "lots of copper a cnc mill, several thousand extra dollars and an understanding of physics." to make your own. You can find the info on the web, like this
, just by doing a simple search. This has all been done by the computer overclockers, even your "new water cooled test bed".
I've been working on one myself. I do give you props for offering to help with assembly of a Do-it-yourselfer. If I was going to buy a cooler I would buy yours! I think it works well and you have a great rep. Obviously you have the education to make a top knotch cooler and I respect that. Good luck and I hope you sell the heck out of your coolers!