OK Mike (muebe) here's my smoked prime TRISKET!!
... Used your recipe pretty much to a tee
It was an unqualified success. I will say that SWMBO gave me the evil eye when I pulled the Tri-Tip at 140ºF to wrap in foil cause that's the sweet spot for me - when my Tri-Tips are so tender you can cut them with a fork and she says it melts in your mouth. I was somewhat skeptical but the results were delicious. Very moist and tender results. Sure is a lot easier to cook than a brisket and to me tasted a lot better than a brisket. Also since there's only the 2 of us it's a lot cheaper to smoke/cook a TRISKET than spend $30 - $50 for a brisket.
Rubbed the Tri-Tip with EVOO & Fagundes Prime Rib Rub. Wrapped in plastic and refrigerated overnight. Smoked at 225ºF to an IT of 140ºF (2 hours) - double wrapped in foil - bumped pit to 300ºF till IT reached 200ºF (1¼ hours) - rest in foil for 15 minutes. For planning purposes only: 4 hours which included preheating.