I bought my wife a Yamaha P-71 electric piano. She was very excited about it, but then asked me to make something that would hold her laptop on the piano. So I measured the distances for the slot for setting up the sheet music rack (not sure what its called) and the top of the piano around it, and I modeled up this bracket. I printed two of them. Figured it'd be a useful thing for musicians who can perhaps modify it to their existing piano or keyboard.