Just a quick heads up (in case you hadn't noticed;D) that I've uploaded an expanded version of my NAMHO paper on the Hunter machines. Dave had to weild a heavy editorial chopper on the one for the proceedings culling most of the biographical bits and the bits about the Munro's of Arbroath. Anyway, here is an amended version of the original with some more bits added.
http://www.aditnow.co.uk/documents/personal-album-54/The-Tunnelling-Machines.pdf Enjoy (I hope) !
Grahami
The map is the territory - especially in chain scale.