They were not at first, and then I had to go out. Very sorry!
They are working now. Please see the post below this one for the stuff you want to see, in glorious technicolour….
I have stood on each link, and jumped up and down furiously, and nothing broke; well not yet anyway.
Perhaps, having sent the men away after work, I didn’t sweep out all the sawdust from the wooden-computer-thingy-workings first, or maybe I missed the odd rat-dropping between the wooden bits.