Lego Technic car with auto-locking Differential

Lego Technic car with auto-locking Differential. The differentials (front, middle, back) are completely open. But if the difference between right and left tyre becomes too much, the ’centrifugal clutch’ locks. The car is built with middle and back differential to lock. So I used 3 for normal differential use and 2 additional diffs for locking. Shall I build a car with 6th differential in order also to have a self-locking front axle?