iFixIt Mac Pro Teardown
I haven’t noticed this referenced yet, but it’s better than the MacRumors/OWC teardown, mostly because I feel the images give a clearer view of what’s going on.
Color me very surprised. That’s really not bad at all as far as future options go.
ADDENDUM: By the way, does this not look exactly how you feel the inside of Darth Vader’s mask would look?