+1 on not needing them on the front of this car.
My take on this crap if it’s worth anything here. Dubbed spill plates for a reason, they regulate even airflow across the airfoils entire surface above and below without any flow disruption near the airfoils extremities(reducing flow roll off near the foils ends) and reduce foil drag. Low speed airfoil technology there. One of the factors in the downward extension of the plates is to dictate the airflow underneath the wing and regulate downforce. Proper airfoils do not create DF by just damming air on top of them but as an inverted wing which provides negative lift with low drag. By controlling the amount of airflow under the airfoil you can control the wings “lift ability”, just in an inverted state. The plates are also used in conjunction with the lower wing foil to aid air extraction from under the car(F1) and reduce drag at the tail from the converging flows 
There’s alot of big time tech in F1 airfoil technology that’s WAY over my head to even bother understanding(like VG placement to direct core flow to other aero), but then again I’m a closed wheel, GE chassis aero guy 
Applying these to a home brewed flashing front splitter on a car is a little off kilt IMO(nothing against your work Tom…LOVE the Grassroots/Racer Wholesale/Pegasus Racing look!!!). If his car was open wheel then I could maybe understand their use for directing airflow over the wheels to reduce frontal drag but again, this is elevated speed dependent…