If you order a waterblock from
www.freakincold.com be sure to test it IMMEDIATELY. He will not refund or repair should you wait more than 2 weeks to test your waterblock, and apparently he doesn't test them himself.
I bought 2 copper water blocks from him almost 4 months ago and let them sit on a shelf while I waited for other components (pump, etc.) Not in a big rush to build this thing, everything had finally arrived and I put it all together saturday and IMMEDIATELY could see a small leak from one of the waterblocks. I feel this would've and should've been caught by him if he had bothered to test them.
So now I have to risk trying to fix a $40 waterblock myself and if I screw it up, I'm SOL.
So I would recommend buying from someone who actually tests and guarantees their waterblocks.