Geof,
It would allow the improved turning radius when running light or in tight spots and yet allow you to drop it on the open road... raise it for toll booths also... I wondered what kind of boat they were hauling with it. but as I remember SHIP is reserved for one over 100 ft. with the weight capacity of this rig .. what a boat... I have seen several class A motorhomes with Tag axles as well as at least one Kingsley. I worry about the ones designed by the class A manufacturers but the ones that came on a HDT would be my preference. I am pretty sure mine will end up being standard twin screw dual tandem Truck conversion motorhome..unless I find a SUPERIOR deal.
John