Tunny Machine Back in Action!

If you're a technology history junkie like me, you probably know about the Tunny machines.  They were an important part of the Bletchly Park efforts that decoded Nazi messages.

The British National Museum of Computing has recently finished building a complete, working replica of a Tunny machine.  In the course of doing so, they've now documented exactly how it was built (this documentation didn't exist before they started their work).

This is something I would really like to see.  Next time I'm over in England, I've got to make a point of seeing this museum (I've never been there)...