I've added the attacher joints in the xml of my super duty, they are just hidden (commented out). if you know your way around xml you can easily adjust that in the xml. Then you would need to adjust the rmc bed xmls to change the mass of each bed option to decrease the weight of them. There isn't much else I can do at this time. If I can find the time, I will provide a more detailed instruction list on how to do it.