Ah...I think the premise is that since my block design was ideally one for aluminum, using copper isn't gonna benefit my design one iota. well...I guess I will stick to Al
1. It mills cheap & easy...not "sticky" like that redish-metal-stuff
2. I can anodize it pretty colors...I'll post some pics when the weather warms up and I can crank up my anodizing tanks again.
3. I Like the Al top plate cuz I can mill off a few thousandth's and put "pretty pictures" in the anodization, and if I get really "fancy" I can re-anodize the new exposed metal a diff color, as long as I can find electrical connection.
4. My temps were good enuff for me...I'm not interested in "Rocket Surgery"
5. The fact that I never went beyond 200 grit lapping(if you can call 200 grit lapping) should probably get me even lower temps.
anyways thanks for the post, it made good reading, and I never realized Al vs Cu was a big debate here...
-MC