Adjusted the steering stops today, well, one of them. The other sheared off, and it took a machine shop 2+ hours to drill it out and fit a helicoil. They commented that the steel was very hard indeed. On the bright side, they didn't charge a lot of money (47 quid + tax), and they are the best machine shop in Edinburgh.
Sometimes, I wish I lived somewhere where things don't rust !
Dave Milne, Scotland