There are times where you need to do 110+ (like on the highway entrance ramp). You guys know what I talking about.. it seem like everyone enters the highway and immediately switches to the fast lane doing 100+.

As for downforce, I think everyone has mention that you need to do. I know what you mean tho. When I'm on the slow lane going 70 and a semi truck goes by the car feels loose. I think some of it is just the light weightness of your car.