Obviously, I'd balance out the front. I've already got hood vents, which reduces front end lift, and I'll also be adding a front air dam, angled forward, to further reduce front end lift, as well as side skirts to create a low-pressure zone under the car.
VGs have been shown to increase downforce when paired with spoilers, because it increases the pressure of the air flowing over them. Without a spoiler, I do believe it will add to lift. I got some info on that from a Porsche 914 racing forum. The 914 has a flatter rear end than mine, so if it plants the back end on those, it should definitely help for me!
Also, the rear bumper isn't exactly smooth. I'll take a picture soon.
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