Firmly believing is still - not knowing that damage is occurring. Perhaps along with microscopic inspection of the styli, we also take and file microscopic pics of our vinyl grooves to be compared with before/after pics after our carts get some time on them?. And We should also track number of plays on each LP regardless of cart used as wear happens each time we play. All of this should also extend the life of cart and vinyl as we would have little time to actually play - most of our time will be spent with inspection and cataloging. Win/win!