Isn't using Beryllium in a tweeter old hat, launched by JM Lab already in 2002 or so?

Cheers, Andreas
My Meridian history 565/519 (1996), 861 (2000), to G68ADV, to 561 today, tri-axial cardioid studio monitors, self build acoustic measures, ceiling sails, corner bass traps, trial Helmholtz resonator, REW, Apple (TV, Mac, IPAD), SBT, Calman