If the sandwich material would take a screw and hold it there would be a lot more CF in the bass cab world. Sadly a minor knock to a fixture will tear the fixture off when it is screwed on.
That sort of 'careless use' isn't so uncommon and accidents happen. In my world the tradeoff for extra super light doesn't overcome my reluctance to have to deal with the fragility.
I said it before, in this thread probably, what they should be doing is a plywood baffle, glue on some more substantial puck style feet, and corners.
Then you would only have to worry about stray impacts. Carry on the super light theme with a Kevlar slip cover.