Outstanding build, very historical as mentioned by others. I always enjoy knowing more about historical Corvettes and development mules. The string you refer to may very well have something to do with Zora's interest in aerodynamics. I'm certainly no expert on the subject, however, I found this information: "In aeronautics, tufts are pieces of yarn or string, typically around 15 cm long, attached to an aircraft surface in a grid pattern and imaged during flight. Their motion can be observed and recorded to locate air flow features such as boundary layer separation and reattachment. Tufting is, therefore, a technique for flow visualization." No reason it can't be applied to automotive development.