Thanks Guys,
I think air flow and removing Rh is the key.
I think even tho our rh meters are telling us it is say 38%. there is still trapped moisture between the leaf causing browning issues when leaf drying.
This was half a load and smaller leaf so I was able to get the Rh out of the chamber a lot easier.
I did vent from the beginning of leaf wilting none stop untill the end of the cure.
The rh was reading way lower than than the schedule during the end of wilting thru leaf drying stage.
The last full load I did the RH followed the schedule for the most part and was not as nice.
I think more airflow would cure this problem by pulling the moisture from between the leaf.
Got to find a jet fan.