The D.S. beak arrived today. It's an unbranded hard rubber piece that just says "France" and "3" (which I gather is not the serial number). David did his magic with it, and OMFG what a difference compared to the humble Yamaha 4C! Far less embouchure adaptation needed (I could play on my tiny cute soprano immediately afterwards without nasty squeaks) than on the Y. So, no more excuses, now I have to repad that monster and get rid of the noise and of metal clacking against metal (some cautious straightening is on order).