Pics of the finished 3/4" section model. It was a blast to build, and i think it turned out pretty well. When I put the photo of the section next to the drawing I was surprised how close they looked, although I suppose that's the point. And, the interior pictures look better than my renders! hope to get everything up on the main site soon.
 
The booklet I put together for the 3rd Year's concrete workshop if finally up on Blurb. You can see the whole thing here (and maybe grab some concrete samples for Photoshop while you are at it). not sure if any on them will get it but it is a cool little artifact and fun to put together.