For any 2014 owners out there, looking for clarification on the 3500 rear suspension set ups. I know the 2500's are sporting the new rear coil suspension with an air bag setup. I've heard on the 3500's the options are a standard leaf pack set up, or an air bag set up that maybe has less or even only one leaf and relies upon the bags for the majority of payload. Is this true? I understand that the one leaf will improve ride quality, but I wouldn't want to rely upon the bags long term. I really like the idea of having a an airbag setup from the factory but not if it is arranged this way. Thanks for the info!