All, I have a 2009 Burb 1500 that is primarily used without towing, however, from time to time I do tow trailers close to the max limit. I have the ZW7 suspension. I use a load handling hitch with the car trailer and the cargo (20ft) trailer. I also have an after market radiator cooler. I was thinking about adding aftermarket coil spring air bags to the ZW7 weaker springs. I don't think it will interfere with the (ZW7) Nivomat capabilities. The ride might be a stiff, but I am towing so no issues. Can anyone think of any issues or concerns with adding the air bags inside the coil springs?