Originally posted by Luis.Santos:
Cool! 
Do you mean, even if I get a SD1 with a old OS, like OS3, I can load from the floppy disk the new OS 4.0 and after that the keyboard will be just like a SD1 bought already with the OS 4.0 ?
Exactly.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.