The only adapter currently available is for a trumpet mouthpiece with a 12mm diameter (Schilke in this case).
I plan to add more clips for different diameters. Until then, the easiest way is to scale all parts so that they fit onto the mouthpiece.
Connector and clip can be printed in more subtle colors, e.g. transparent filament. No support required.
The author remixed this model.
Changed to a modular design so that it can be easily adapted for different mouthpiece diameters and printed with different colors. Also supports aren't required anymore.