The bookcase returns...

So it's been a while, but I was working on a design for some bookcases for our upstairs here in the Barn, and I finally got around to modeling out one of my sketches. Here it is:

So those ribs would be cut via the Shopbot, and jointed together with some rods, bolts, or something along those lines. Maybe a keyed joint, like a puzzle bit too. This is just a design model to get some ideas, thought I'd post it here, for it's my favorite so far. However, I've got to make at least the bottom part and stand on it to be certain that it's joints can take the weight of all the books...