I liked how Tostie handled the buttons...it was pure "choreography of the hands".
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Personally, I only use a sustain and volume pedal, and I prefer activating fills and changing registrations via panel buttons.
Whatever floats your boat.
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Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.