I know a lot you people here have seen that or used it years back. I'm talking about the electone or console organ. I onced used a Yamaha organ back in late 70's and early 80's with a cool knee controller and another next to its expression pedal where you can toggle with your big toes to add a simple effects like vibrato or something. Do anybody knows what model number is it? I know Yamaha have that but I forgot the model number. Also is there a similar controller we can use for the PSR keyboard to get our knees working with the groove? I guess we can call it knee controller. Thanks guys.