As reported by John Bunyan on the Macc website home page, all best wishes to Mark Hartell, Lizzy Hawker and Stephen Pyke on their mega mountain run.
I could not help thinking that the Planet Fear website article about how to look after your feet may be useful revision and of interest to anybody else contemplating doing long things like the Karrimor soon. The gory pics are great and you can compare your previous blisters with those photographed to estimate the degree of suffering.
http://www.planetfear.com/article_detail.asp?a_id=634
The best tip is to inject iodine into your blisters while holding your breath and biting on a leather strap.