The top of the old box was warping a bit and caused the Arduino to rattle and buzz with playing. I asked Jin to 3D print me a new box to keep the Arduino more secure. The top is thicker and it is bolted down in all four corners, plus the one in the middle. I also stuffed the battery into a sock and sewed the top. Buzzing is now down to a minimum while playing on the G string. I doubt it would be noticeable to the audience in a performance setting. I think there is another cause that is no longer related to the box.
Welcome to the TRAVIS blog!
If you would like to see a summary of my work, please click here.