Donny, we both know it's not as good as Songbook in Korg.............but you may want to re-visit if you already haven't the improved MFD on your s910. It's not the only tool I use but the ability to add not only styles( from USB stick), midi files and even mp3/wav files to the MFD has made it a more viable tool. Sure it won't save key changes, but I just make a notation in the MFD entry. I'm at the point with that after making edits to my styles and SMFs I store them to the USB ( or hard drive on the T4) then pull from either for live gig play, it works for me.

Now if only Yamaha would allow pulling registrations into the MFD, they'd have it perfected.