BTW, FC-7’s are getting harder and harder to find, but all they are in essence is dumb momentary switches, so constructing your own custom switch setup is relatively easy, from as small as a simple dual switch that you can buy anywhere, to a repurposed Korg EC5 five switch pedal, to any combination up to seven pedals placed anywhere you want...

Think about what you need, how you are best going to use your feet to do what you want, and a solution will present itself.

Personally, I find being able to change Variations without moving away from playing to be wonderful (I like to use Pianist Mode a lot), and when playing with SMF’s and MP3’s being able to change Performances hands free (using Perf Up/Down) is great too...

About the only thing I wouldn’t recommend you use an FC-7 for if you find one is for sustain. The switches, although very reliable in normal use, aren’t really up to the task as sustain, which you use hundreds of times per song. Use a proper sustain pedal for that!