Power supply hanger for Kawai ES 920 stage piano

I have a Kawai ES 920 stage piano and I was always a bit annoyed about the lose power supply that was just standing on the floor. 

Now I designed a small hanging box that can be attached to the Kawai HM-5 piano stand and where you can put in the power supply unit so that it is attached to the piano. 

Print the “Netzteil-Haken” twice and the “Netzteil-Box” once. Put them together and hang it on the back of your piano stand.