I've had a GS-1 Yamaha for quite a few years and have finally messed with it and got the strip reader working, and LOVE the sounds that it produces. I need to open it up to loosen ONE hey and am wondering which of the MANY screws on the bottom release the lid. Also wondering what something like this might bring on the Keyboard Market. I hear there were only 100 of these made and that they cost $25,000 new. I have two packets of the Sound Strips, and the unit is complete and ALMOST works perfectly. Cosmetically in pretty decent shape, ESPECIALLY given its age and the fact that it it was lugged around for concerts. I believe that his was Toto's first FM synth and it you look at the Africa video I believe it is THIS unit that you are looking at. I hope there is a GS-1 Guru out there!