why couldnt someone (me) buy a computer heatsink, take a bunch of thin aluminum plates and drill holes in them, stick them between the fins, and seal the thing up with an expoxy for a water-block? Sometimes i see waterblocks on ebay for 40$. If someone had a pump, watercooling could be done for very cheap. And instead of hoses and other things that can leak, use annealed copper pipe for everything so there wont be chances of leaks. why not?