If your clarinet stand broke like mine did, don't worry I will show you how to repair it. First, download the file and print it. While it's printing, you can remove the three legs from the sliding piece by unscrewing the three screws under the sliding part. BE CAREFUL, SMALL PINS WILL COME OUT. The result is shown in the pictures.

Next, unscrew the small screw on the plastic part under the yellow cap. Gently remove the yellow cap and the plastic ring under it. Take out the broken piece and insert the new one. Reassemble the stand starting with the three screws you removed first. Don't forget to replace the pins! If one of your pins is missing, you can use filament cut to an 8mm length.

Replace the yellow cap and the plastic ring. When you tighten the screw, press down on the cap to ensure the screw is fully in place. That's it your stand is now good as new!