Good you enjoyed greensand but don't take any risks with your Achilles, don't spoil the chance of success in a 100 for what's essentially a training marathon.
My day has raised more questions than it answered unfortunately, I had planned to run two legs of the race this morning but I just couldn't get out of bed, absolutely shattered for o reason that I can see. So early afternoon I decided to run a portion of the Thames path which is less than half a mile from my house, I figured one part of it is much the same as the next. The first twenty miles I felt absolutely fine even though it was horrible going in road shoes, miserable weather but all good practice but the next ten miles the wheels came off, my hip was a constant embuggerance but for that distance manageable, not sure how it'd cope with another 70 though. What was really a shame was that I just had nothing in the tank, no energy at all. Now whether that's because I've done bugger all running since SDW, literally less than a third of my normal mileage of because I'd done another 30 miler last Monday I don't know, I'd hate to miss this one out but at the moment the chances of me finishing never mind putting in a decent performance aren't high