I think the confusion is with the newer keyboards that no longer have the MUSIC FINDER as my S950 has. It is a handy feature that Yamaha has done away with for some unknown reason.
With the SX keyboard you will be stuck with using the registration to call up your custom song styles. You might use Slot #1 to save the intro you will use for the song. Then use Slots #7 and #8 to hold your mic settings.
I dread getting the SX keyboard knowing the Music Finder is now missing from the keyboards. I may wind up simply putting my styes in 20 folders with 16 styles (songs) in each of them. Then just select the style I want and referred to my lead sheet as to how the song starts, with an intro or one of the mains. That way the registrations I would still only use for Mic settings and controlling the backup singers.
Hi Drake
You CAN actually have the Music Finder Database on your proposed new SX900.
It's just called PLAYLIST instead.
I've transferred all the Tyros models except T1, and also have several other TOTL keyboards on my regular memory stick.
You basically just put the relevant MFD file on a stick, and then put that into the SX. It then advises you that you can convert the file to a playlist.
Each mfd file takes 5/6 minutes to convert, but once done you then simply press the new (say T5) file, followed by your playlist button, and it's all there just as before.
The ONLY thing you can't do, unlike the older models, is scroll through the list alphabetically except by using the Up Down buttons which can be a bit tiresome. There's no quick A_Z search function.
I have about 15 Playlists including your S950, G1 and G2 on my SX700. All play well.
Why so many.... Well because a lot of older songs are not on newer keyboards.
I'm sure you will really like your SX when you get it.
MFD files are here to save you a search.
https://psrtutorial.com/sty/OF/musicfinder.htmlKeith.