Embarrassing to admit... My tone circuit was configured incorrectly. Oof. The potentiometer wasn't properly grounded. Super lame.
I did fix the othrt potential ground issue I mentioned before.
Works a charm now. Buzz free.
Discussion
nutt'n wrong B*n B*eaRassed/or not-f th@ my friend*/* *_* _____lolz*
It was super cool of you to let me talk through it. It helped focus on a plan of attack.
Tell your friend I said thank you as well.