After reading the trial, IMO I would put the "V" in the bottom of the firebox where the vent flanges are. If you want to sell to most Weber users, they will not want to disassemble anything to use it. I am not sure how your wGrill attaches to the firebox, but I think making this easy to install will be one of the biggest selling points.
Team: Pyle's BBQ; Yoder YS640; Good-One "Trail Boss" 60T; Weber Kettle w/rotisserie ring; Big A$$ Rotisserie; Weber OTS; New Braunfels offset smoker.
Saddles BBQ Bistro