Good luck man. Took me roughly 5 attempts to get to 72 hours. I would always tap out around 60 hours.
I will say one thing that seems to matter more than amount of hours is how many good sleep cycles you get in while deeply fasted.
I always seem to start sleeping amazingly well after 36 hours
Keep drinking the water. I’m 63hrs into like - 5 day fast or something, it’s set at 137hrs for a minimum. Today alone I’ve drank nearly 4L and I feel the same as if I’d just started the fast, it’s great.