That's great, a new toy!!
Enjoy and have fun with the new SX-900.
Over the past 10 or so years I've bought 3 keyboards from Frank at AudioworksCT. He's a great guy to deal with and you will get treated very well, that has been my experience. Just as things were starting to close up at the start of the USA Covid crisis, Frank went above and beyond to get me my new SX900 before the mass shut-downs.
Anyway, I came from a S950 and have found the SX900 similar but different many good ways.
Good luck with your new Kbd. Ed L.