Ok, I said all of that just so we have a common knowledge of what we're talking about. To Neils point side winds are going to be critical given the narrow width of the car and tire track. The real wheel track is only 9.5 inches center to center. Given that my knowdedge of what moves Cp along the length of a body is very limited at this point I have to guess mostly. I will ask what is it about the needle nose shape that leads you to believe the center of pressure of this body would be at the front rather than and the widest spot longitudinally? Will the needle nose matter more in determining Cp than the stabilizing fin at the rear? The width of the underbody at the hinge pin for the front suspension is 4.8".