Korg Poly800/EX800 Users

I only have the Poly800, a DX-7 and a JX-3P - cheap stuff...

One day I need to get a Jupiter, but it's so damn expensive. I've also
started working on a SID-based one. It worked on the prototyping
board, but I'm to lazy to make the PCB. But I would love to make the
OS. I had a very basic one which played a fixed patch over Midi.