Audiooracle, I saw recently that Joe D'Appolito, knowingly called "Paul DiAppolito" by that other unbiased sage of Usher speaker technology Aintitgr8, changed the tweeter and midrange of his speakers to beryllium and has been driving his Ferrari reconfigured from carbon fiber, aluminum and titanium to wood, mdf, lead and epoxy, all the way to the last century.
As with you, just trying to be informative.
No axe to grind here, obviously.