I read through your 40 day fast again and was curious... in addition to dry fasting for between 3 and 4 days at the start, what other dry segments did you have?
I will normally go dry each day resisting mild thirst then drink once the thirst becomes more moderate and persisting, satisfying even mild thirst within that window. This usually amounts to about 15-20 hours dry each day and a 4-9 hour window of drinking to thirst.
After the initial 3-4 day dry fast were you ever "thirst-less" enough to exceed 24 hours again? In my own experience i seem to have one slightly longer dry fast in me then can never exceed 20 hours again within the same fast.