Not that I wish the author anything but the best, but he's not alone in this. Tim Robinson, of Meccano/Erector Difference Engine fame, has been working on buil

Not that I wish the author anything but the best, but he's not alone in this. Tim Robinson, of Meccano/Erector Difference Engine fame, has been working on building the Analytical Engine in Meccano for some time. His website (http://meccano.us/analytical_engine/index.html http://meccano.us/analytical_engine/index.html) shows a working control barrel from three years ago; I believe from memory (I'm on a mailing list with him) that the design and construction has progressed since then, though I don't have the details to hand. I wish them both luck, I'd love to see both designs up and working at the first possible opportunity. Tim's Difference Engine was a thing of beauty to watch (there certainly were videos online) and had a fantastic sound in operation.