http://www.korg.com/us/products/synthesizers/pa3x/

Not sure if everyone (PA3X/900) has seen this. Mine starts with 6000+, so I guess I'm good.

Question: Do I need to load in all past update OS or just the current one?

Thanks, exploring keyboard, although I'm a bit disappointed that it looks 'open box'. Settings made by a "john" tipped it off. argggg. They also forgot the power cord - what's that tell you. And Korg hours are better than a banker -sheesh.