Hi Lynn, I think you are right, the weights (if they are weights) are distributed evenly on the hull so yes I think now too they are setting the ride of the carrier, perhaps uprated springs would of been required, i have seen another picture in a canadian book on the 2 pdr gun featuring the carrier at speed over ruff terrain so i think they were putting it through it paces. Also like the idea of sound deaderning on an un equipped carrier, I think applied at the request of the driver!
thanks kevin.