Trumpet Buzz Extension Resistance Piece (BERP) Kit - Custom Colors

Description

This kit includes 3 ABS buzzing devices with different bore sizes (13.5mm, 14.25mm, and 15mm), 1 M4 wingnut/hex bolt combo for attaching the device to an instrument bore, and 2 restrictive collars (one that mimics the resistance of the non custom version MkV and one with extra high resistance MkIV).
Video Overview: https://youtu.be/tlx9vJq5vnY
Note:
I'm rjm27trekkie (Robert Meade), and I reserve the rights to commercially use this design.
To produce your own, which is allowed under the license see
https://www.thingiverse.com/thing:2607258/files.
This product's non custom equivalent's US patent expired in 2012 (https://patents.google.com/patent/US7329809B2/en). Search patent number on https://portal.uspto.gov/pair/PublicPair to verify status.