If you need help with your S-770, let me know (email me at palpullero@myway.com). I just acquired one and I already took it all apart to clean it an replace the LCD backlight. Next is updating the OS, hooking up SCSI devices and start sampling. I need to get more Atari SC1224 monitors for the display (wiring is simple and straigh), and I got an RC-100 remote controller, although I can use one of the mice from my two S-760. I plant to put up a website to support this sampler and maybe you will be able to contribute. I'll keep you posted.
Cheers.