I've only done a handful, a dozen or so, more a mixer guy. The 2nd image and the last one are two of my fixes. The mechanical pianos are really amazing inside. Brad did most of the keyboard work at Third Coast. Anyway, he works on all the old ones and the newest of the new. We're talking Rhodes, Farfisa, Wurlitzer, Yamaha, Casio, Alesis, M-Audio, Korg, Roland, and all that stuff. He showed me the spring switches in the Farfisa with the multiple oscillator voices. Its really quite a craft to be able to work on some of these.