Quote Originally Posted by Thomas FJ View Post
But maybe the lesson about cracking tops was more than enough for them, for all this "full copper" doesn't make any sense to me at all. It only makes the block more expensive and heavier - not better.
Whoa now, you're wrong there. There are guys who run chillers, and for them there's nothing better than a solid copper block. Delrin is nice but supposingly cracks under low temperature. Lexan/Acrylic you can't pump ethanol/methanol through because it attacks the plastic. So solid copper is the way to go.