One for next year

I can't work out why my calculations would not automate but I did lots of manual sorting to produce this list with the improvement between first finish and personal best:

total mprovement

Its interesting, and was asked for by lots of people but its difficult to say who achieves the most - the person who walks around at 18 hours on the first finish or the person who starts on 24 hours and improves to 18 hours.

I'm off running now and meeting my brother and his family for lunch so there won't be so many updates today until late this afternoon but I will be online late morning.