I've always used Yamaha for Volume, Sustain and Harmony. I've had them for at least 10 years and they still work.
Let me clarify something though .. .
When I use the footswitch for Vocal Harmony, I must press it once for on and press it again for off. When I had an external Digitech harmonizer I could set it for momentary and the harmony would be on only while the switch was depressed. I haven't been able to get the PSRs to do this. Is there a way I have overlooked?
DonM