Has anyone converted their factory coil springs to the factory air ride on the 03-06 expeditions? I know it is kind of backwards from what most are doing, but i thought that it would accomplish what i am wanting...I would like to add the factory air ride and a on board controller to adjust the ride, and since people are getting rid of these by the hand-fulls they are pretty cheap to get. Basically would this just be removing the strut and installing these and wiring them up?