Paul, those headers definitely have the right "look"! I think a wing would look right, also, just not too big or too much chord, early days and all. Can you give us a source for those headers?
Brian, the headers came from Shapeways. Right style and "look", but a very rough surface finish by my standards. Also the collectors don't mate up to any size tubing so a lot of grinding to blend them in. Worked out OK.
Paul, this has been a cool project to follow. I am glad it turned out well for you. It has been enjoyable to follow your progress on this one. The F5000 section has been fun since we added it here and this shows why.
Great choice on keeping the rear wing removable, best of both worlds.