I hadn't seen a Cambium before. I've just looked. Is the underframe metal, or is it some kind of rubber/resin? If the latter, I'd be really careful about load. You'd want a support that did not hang off the bag loops, in my view - then the loops would be fine, just retaining the bag in place.
Even if the loops did not break, you'd get wear with the tangs moving around and carrying a lot of the load. Metal against rubber is always going to wear - ask your brake blocks.