Kyle, you really don't have to spend 18 hours on a brisket with the Akorn. I think you will find that it will take a lot less time. I have been doing smaller briskets in 5-6 hours. What are you using for a heat deflector?
Team: Pyle's BBQ; Good-One "Trail Boss" 60T; Homemade rig; 22" Weber Kettle w/rotisserie ring; Big A$$ Rotisserie; BGE-Small; Weber Kettle Gold, Weber OTS, New Braunfels offset smoker.
Saddles BBQ Bistro