Very, very nice, Doug!! 8)
If you really want to make folks think that brisket was done on wood, give it a sprinkle of Morton's Tender Quick, wrap it and rest it in the fridge for 30 min to an hour. Then, rinse thoroughly, pat it dry, and apply your mustard and rub. It will have the prettiest "faux" smoke ring! Doesn't effect the flavor, but food is visual, and lots of folks see that pretty pink ring and think it looks better, so it must taste better! (Even though we know the truth...the smoke ring is just eye candy!)
At any rate, that looks really good, to me, ring or no ring!