As usual we go off at a tangent from the OP. I love it! That’s what makes this Forum interesting.
Back to the Prof’s story. I have a parallel.
Twenty years ago , no names , an Italian Gas Valve manufacturer sold tens of thousands of gas valves into the U.K. domestic boiler manufacturers market. The valves were plastic, interference fit into their housing, also plastic, They failed causing a massive very expensive Product recall claim. Problem? Snapping the valve stem into its plastic housing caused the housing plastic to fracture. The valve became insecure.
Cost the Italians a lot of money.
Yet. Al-Ko and our British manufactures still will not recognise a premature axle failure🤬🤬