I want to lift the rear of my 2012 Navigator 4x4 but want to keep the air suspension. I have read that people have lengthened the ride height sensor arms to do this. How much lift can you get this way? I may want to go as much as 2". Will it change the ride quality? I can't seem to find a detailed write up on anyone doing this. Is there one out there? It appears to be very simple but would like to sure first.