I do not us a TAV system. I use a Comet 30 Series asymmetric style. The reason I chose to use this is two fold. First, both clutches mount on a single plane. The second, is because if you use a TAV style, with intergrated plate, you have no choice on how you mount it. I will look like a minibike setup, not matter what you do. I choose to run a jackshaft setup, with the driven plate mounted up high. This gives a more simplex like appearance. I use high quality pillow block bearing to hold the jackshaft, as opposed to a flat steel or aluminum plate, that has a tendency to flex and break.
Years ago my son had a go kart that I put a TAV style torque converter on, and within 2 weeks the steel plate had flexed and cracked. I welded the crack up and welded a doubler plate on the back side to hold it together.