Regrettably this project is not going ahead which is very disappointing because the Crossfire has a lot of potential for my purposes and I just like them. Basically too much work, unknowns, potential project killers and annoying costs such as high shipping charges from the US and EU eg a CF bonnet/hood ~ U$1500 for just shipping. So I'm going with a Nissan 350Z which I have some previous experience with, it's heavier than a Xfire which likely has a stiffer body too but they are acceptable challenges.
Thanks to those who helped with the information, have lots of good ones.