Im curious if this device has permeated into the trombone world? I'm making a clip that holds the trumpet version of this device to the horn in place of the hair tie elastic it comes with. Those of you who do use a "First Aid" if you are interested in a trombone version please let me know.
Here is the "clip" I made to hold it on:


More info on the First Aid can be found on the manufacturers website:
https://www.arresonance.com/product-page/first-aid