Jeff,
Excellent job !!! Brisket slices and burnt ends look delicious !!!
Brisket is a difficult cut of meat to get just right due to its short tenderness stage as well as its nature to dry quickly once sliced.
It can be perceived as dry both just before that tenderness stage and also following that tenderness stage.
Determining which side of the tenderness stage will assist you for your next brisket.
We, judges, use the pull test to help determine tenderness. Taking a slice, you should be able to pull it apart with minimal effort yet it should not just fall apart.
One can easily see a brisket that is overcooked. The edges will just crumble off when sliced.
Also, to somewhat counteract the natural drying effect following slicing, dredging slices in some of the brisket's Au Jus will help.
Bob