Hi Simon

I have a PSR-8000 and agree that the thumbwheels are a good idea. They are more compact than sliders and can work as rotary encoders, which makes sense when you have an LCD to show values. I heard that Yamaha dropped them because users did not like them. But I think the problem was not in the thumbwheels, but in the software--there was an awkward latency in the response to thumbwheel motion. I would like to see them return with more responsive software. Actually, thumbwheels have reappeared on the Hartmann Neuron, but that's $5k and not an arranger.