This is a tool for the coolest instrument ever! ;) I measured everything to be the same size as my mouthpiece so I hope it works, though it may not sound as good as a metal one.
This is based off of an image(1) on Wikimedia by (2). Since the image has a creative commons share alike with attribution license I am obliged to use the same here.
mouthpiece.dxf | 64.1KB | |
mouthpiece.scad | 115.0B | |
mouthpiece.stl | 17.2MB | |
mouthpiece.svg | 10.8KB | |
Trumpet_mouthpiece_cut-away.svg | 12.5KB |