BladeRunner,
Yeah, "Copper" and "Lighter" don't necessarily go together... as you say... "as light as possible" is my goal.
As for the pad on the back side of the GPU area... I was planning a layer of Arctic Silver II (I don't have any Arctic Silver III). My understanding is that ASII and ASIII are not conductive. Am I mistaken? :shrug:
G33k,
I too pulled one of my first CPU blocks (simple drilled passage block) and it's defintely heavier than my current impengement CPU block.