I made this for my doughtier who is learning to play the flute.

She is 1.3 m tall, so I was able to use the inner cardboard tube (51mm {2"} inned diameter) of a standard plotter roll.

Top Connector piece should be printed with more than 20% infill in the connection with the sheet holder. Mine failed in usage and i neede to glue it up. 

For Base I used archimedean chords for bottom fill pattern with the added supports in the model.