ducts

New to the forum, mostly stalked before. I'm wondering if anyone has installed or built their own radiator ducting for their S550? I'm looking for inspiration or ideas to tackle the project while there is still snow on the ground here in Minnesota. Appreciate any help or opinions from anyone...

So right now I'm on a bit of an aero research frenzy, mostly looking to reduce drag but also improving down force/reducing lift where there isn't too much penalty. So far I've found APR's GTC-200 drag wing that claims to reduce drag and add some downforce but what other options are there...