It's just not a question of the local's just "shedding" the wing and running. Quite a few changes have to be done to the car mechanically as well as purchasing different parts for the car that are not utilized in the teams normal wing operation. These include longer front axles, different wheel offsets, torsion bars, sway bar option, completely different tires, and even shock packages. Easily over two thousand bucks invested to run a couple of races, where in which the guys who don't make the proper changes usually end up upside down in the fence during qualifying.