I made it.
Everything went according to plan for the first 50 km. 2km run with 2 minutes walkbreak. Clocked in at 8 hours 7 minutes. 16 hours was doable if I just did the same thing for the next 50.
I sat down at km 50 drinking coffee and ask myself how can I run another 50km? While slowly sipping the coffee, I thought of a change of strategy.