I have read the post of the "project 100" and I consider that the price paid for the low rider position doesn't worth the maneuverability lose. There is a lot of space lost and a long distance between axles. CG is too much to the back. It's a personal opinion, I might be wrong, but in order to be constructive I thought to an alternative:
This approach might not improve the aerodynamic at maximum possible, but I think is the most economical way. This might be a beginning for a further development. I hope I will find time to model it in 3D full size.
Let me know your thoughts.