Here's how I do MFV on my Tyros 4: "Jazz Guitar Club" style @90bmp + 3 regs.

For the first AA, I use Variation A: Fingered on Bass, LH Voice, Organ Accmp 4, RH Voice layered: Vibe,Clean Gtr,Concert Grand.
At the Bridge, I use Varation C (double time feel): Fingered Mode, LH voice (piano) and set to fingered mode, to support playing smooth voice leading style chord inversions. I also play vocal fills on the keyboard using the S.A. 'scat vocalists ' which nicely augment my singing of the lyrics.

Ian, would love to hear how you do the tune in 3, so if you want, you can easily expand your limited 'audience of one' to many, by simply recording and sharing it with us.