Done now.
It's not easy putting PDF links into articles, you can't just pick them out of a browser. The best way is to edit an existing one, but if you replace an 'A' with an 'A' you don't get far…
I really do like this design though, I very nearly made one when I got my collection of back issues off my Uncle many moons ago, but of course I already had a 4-jaw.
Neil