Yamaha CS80

Hi!

I do not have a control pedal for my CS-50 and I am under the impression that a standard pedal like a 
Roland EV-5 does not work on a CS machine.

Am I correct?  If so, does anyone know of a standard pedal that will work or what kind of mod must be 
done on a EV-5 to work?

Thanks!

-Jim
 www.touchxtone.com