If one of the biggest body producer, selling ten thousands of bodies to racers worldwide, announces the successor of the most successful touring car body of all time, I expect them to have analyzed what makes the "old" shell so good, and what were its weaknesses to improve in all areas. Therefore they must have "tools" to verify what we as drivers feel on track. As it is all about aerodynamics some strategies to know what the air does would be useful. CAD-Simulations can help as well as aeropaint. And some wind tunnel time can be bought "cheap" from universities. No need to ask McLaren for that...