Being a pessimist, I foresee many owners bending the casing just enough to make it useless ... If not that, a grain of sand down the shaft will probably jam it

Being a pessimist, I foresee many owners bending the casing just enough to make it useless ... If not that, a grain of sand down the shaft will probably jam it good. And, to be a complete spoilsport, "how it will look in fifty years" must be minus the nicks and dents on the sharp edges.