I replaced the elastic webbing with jute. The green webbing was just to soft, when I sat in the seat I sank through to the floor. I could not for the life of me find a supplier of the correct seat webbing, well I could not find a supplier up here. Everyone kept telling me "This is what we use for seats"
I understand that eventually it will sag, but it is much better than the soft rubber webbing that was in there.