Wings
Since there is a follow-on conversation on wings and aero balance on this post; I guess I should elaborate. I don't recall the specific details of the conversation GulfGT and I had, but aero balance is a critical consideration.
Could a wing be added without any compensation up front? Sure, but with a lot of consideration to the effect. At some point, you cross the threshold where you've added enough down force or drag at the rear that changing direction becomes problematic. It's a discussion of orders of magnitude. It is the difference between a change for styling and a change for functional improvement. Execusion is everything.
Just like a few guys noted, adding downforce (or drag) at the rear of a car is a lot different than adding it in the front. Things have to be developed as a system, if there is going to be a functional benefit.
When I do the wing, it will be with the benefit of the full compliment of aero aids, airfield rental, actual pitch couple measurement (at vmax), and consideration to the aero load paths, etc...... In other words, a ton of work and expense...
Guys are wise to not monkey with the aero balance unless the changes are fully engineered. The team got the baseline right.