Don: I'd have thought a treadie was worse for an injury as it is the same action constantly repeated whereas on other surfaces you are constantly re-adjusting without realising. I'd steer clear of roads as far as possible. And yes, sounds like you know the lyrics! Keep hearing this song this year.
Another 3.15, so 99.26k to go in ten days. A bit concerned that I might not do it as there will be a couple of days where I will struggle to fit much in. New Year's Eve may see a very long run at this rate!