That's a very nice system you've got there, I suppose that if you had 2 cameras, and your software could handle it, you could shoot both pages without moving much.
This looks like a pretty viable alternative to the >$10k automatic system that someone posted about a year ago. I'm certainly a lot more likely to do something like this than shell out for the library-grade machine.
The book holder looks like it's the most complicated part of the assembly -- do you find that a particular angle is best for the shots? I'm wondering how much you'd lose by going with a fixed angle holding bed, you see.
Thanks for posting these, ereszet.