can you swing the top clamp round through 180 degrees so that the damaged bits do not necessarily meet up with the damaged lips on the lower part? It looks symetrical so could be worth a try.
It looks like quite a soft alloy which, if the ribs do not match the lips perfectly, will deform when pressure is applied through the medium of a big arse bearing down on it.
can you swing the top clamp round through 180 degrees so that the damaged bits do not necessarily meet up with the damaged lips on the lower part? It looks symetrical so could be worth a try.
It looks like quite a soft alloy which, if the ribs do not match the lips perfectly, will deform when pressure is applied through the medium of a big arse bearing down on it.