What I learned in this cook was that no matter what, you have to be patient and wait for the brisket to be probe tender.
This Brisket reached 204 degrees internal but wasn’t probe tender, enetered a stall, temps retreated even with steady 250 degree pit temps all the way from 204 back down to 189. It wasn’t probe tender until it came back up to 195F.
Patience and understanding the stall paid off. 
Northeast BBQ 