Kurzweil Midiboard & Polyphonic Aftertouch

There's a Kurzweil Midiboard currently on the *bay. It's supposed to be quite an amazing controller with weighted piano style keybaord. What attracts me to it is that it has Polyphonic Aftertouch. Polyphonic Aftertouch allows you to apply the aftertouch of one note to a given modulation; if you are holding down several keys, only the note you apply aftertouch to will respond. This allows you do do things like hold a low chord down with the filter cutoff set low while playing an expressive lead with the filter more open. Most synths do not allow this; instead they will apply the modulation to all keys being played. I believe the Yamaha CS80 was the first synth to offer Polyphonic Aftertouch followed by the Sequential Circuits Prophet T8. Kurzweil offered it in the Midiboard and eventually Ensoniq obtained the patent on it (or rather they obtained the exclusive patent on an affordable implementation). From that point forward only a handfull of Ensoniq synths offered Polyphonic Aftertouch. However many synths like the Waldorf Q will respond to it. The Alesis Andromeda was supposed to respond to it but reports have it that there is a bug that prevents it from working. It's a same that no current/new keyboard controllers offer the feature.