Airride; 4 seperate wheels or just front/back
 

Want a basic setup but do I really need a 4 wheel control(4 switches) or is just front / back(2 switches) good enough. I can imagine air going from the one into the other bag while cornering the car.
I also heard guys telling me this isn't that way. just front/rear is good enough.

running shockwaves front and air over leaf in the rear.

4 way is the ONLY way to go. With a 2 way you are just running one airline to the front an splitting it off to each spring. This will allow air transfer cause more body roll.