Looks nice OP. Something you don't see much of but the tri tip is pretty good.
We had a Church function I was involved with in the fall that fed close to 1250 people. One of the meats we did was tri tip, I'd never heard of it before. Used the following rub recipe, seared them on a griddle then ran them through a convection oven until they hit about 130 degrees internal. They turned out pretty good and we received a lot of compliments. I used the same rub on rib roast and cooked it up on my backyard cooker, it turned out real well also.
2 tablespoons finely ground coffee
1 ½ tablespoons kosher salt
1 ½ tablespoons granulated garlic
1 heaping teaspoon black pepper
1 tablespoon brown sugar
¼ teaspoon cayenne pepper
¼ teaspoon ground cloves
¼ teaspoon cinnamon