12g is perfect for the Rx8. I wouldn't go any thinner. I will post some pics of mine soon. Since I work at a hobby shop I spend more time working on everyone else's car instead of mine. We are also in the process of building a new indoor offroad track so I've been short on time. Frank from what I could see on the video your car looked amazing in the woops. Just soaked them up and kept great speed with stability.