Hey, has anyone tried the Piano expansion card that Yamaha makes? Worth the money? I have a Yamaha 9000 Pro and I'm not crazy about the stock Live!Grand piano sound... it falls off too quickly for my taste on the high end and playing it at low velocity simply rolls some high frequencies off the sound. Strangely, the piano expansion card is the only one that Yamaha does not have mp3 samples of on it's websites. I onder why...