Hey,
I noticed some potential hints on the FFR website.
A frame picture includes a silhouette of a roadster design over the frame in the "Project 818 Gallery."
FFR 818 Frame.jpg
Also noticed that Xabier's design is the cover for the "Project 818 Design Contest Winners" and in that folder it is both the First and Last photo in the sequence. Others designs appear only once. Also Xabier's track car is on the Project 818 kit page.
I am looking forward to seeing the CAD pictures. A SolidWorks e-drawing which we could all view with the free viewer from SolidWorks would sure be nice. Also could highlight your wonderful CAD partner.
Regards....