First of all congratulations for completing the Paris Brest Paris. I had a much smaller problem with a new bike. I compressed the tendon of my left thumb on a 6 hours ride (imagine a 89 hours one. ) It got too weak to open a clothespin, no chance to shift a MTB derailleur. It took one month to fully recover. I permanently solved it by raising the handlebar to transfer some load to the back. My question: do you know if some long distance riders compromise the setup of their bikes to lower the chances of those kind of physical problems?