In my opinion, the anchors on the TC will fail, or the framework around the anchors will fail, before the material on the bed will fail. As you know the happijac system using clamping force to secure itself to the front of the bed; so it is spread across a large area. As opposed to a small point trying to puncture or tear the material. The bolts provide the clamping force, and don't necessarily carry the load like you are imagining that will rip through the metal. It also bolts through the floor of the bed and hits a crossmember. I personally would do it if I could afford a new truck that had an aluminum bed and/or body.
