James, that is a great review and a splendid time.
Bill, you may be 11 years older than me, but it looks like you will be well ahead of me based on that time prediction.
I struggled around the Grantham ultra over the weekend, 2 days of 29 mile each, in 4:47 and 5:14, and that was flat and in good weather.
I'm starting to get scared now