Zuki, well, that is certainly clever, while trying new keyboards making extra bucks, I didn't think of it :-) quite a journey you are having :-)

Diki, thank you for these tips. I will see if my interest in VSTi will last... There is indeed this "track mixdown" option, it also can be called "freeze", but this thing always irritated me as you never really know if any track is actually done. It makes the process linear, while creativity should be more free. My computer handles a decent number of tracks; it's just not ready to work as piano; but I'm taking a break from piano as well; although with PSR-S670 I probably just have a half of piano, but that's better than nothing :-)