DIY Polyphonic Aftertouch

[stephenvv]

I'm planning on converting my demo to full version but would like polyphonic aftertouch. However, I'm not findin in old keyboards that support except for one SQ80 that's beat up and smelly.

Anyone every created a mod kit to add polyphonic aftertouch to a monophonic aftertouch keyboard? Or ideas how it could be reasonable, reliably and affordably done?

[Marzzz]

I have a GeneralMusic S2 keyboard in EXCELLENT condition that has polyphonic aftertouch (as well as 7 assignable sliders!). I just recently acquired a Kurzweil MidiBoard (poly AT on a piano keyboard), so I wish to sell the S2. Before I put it up on eBay, I would like to offer it here. If you or anyone else is interested, please contact me "Marzzz" on AOL. It is a 61-key synth keyboard, includes original box, manuals, disks, everything!