I think a lot of people might be confused on how a DCCD actually works, and what it does. Do some research and grasp the technical workings of the unit. Some people may not need or desire it. Some people may long for it. If you go with an aftermarket controller do research and make sure it is installed correctly and then functions correctly, whether its a seat of the pants test or someone on both sides of the car checking for lock up on all wheels, but again the functionality of the DCCD will depend on what type of differentials are delivering or NOT delivering the energy to the ground. There is a lot of technical material available, a lot of drivetrain options and configurations along with several different controllers available.