Anybody know why there are no editors for the Kurzweil PC-88?

I realize you can't edit the internal sounds, but an editor for editing the "Midi Setups" would be nice.

I've spent a lot of time editing a friends PC-88 and my keyboard players PC-88 MX, and editor would have made my life easier.

It seems like there must be some technical reason, otherwise someone would have done it by now.

Jay Storey