I don’t think all truss rod nuts come off to get a washer on though do they ? , I always thought dual action ones were fixed, otherwise they wouldn’t work both ways
I watch all the Karigan drumming videos, but this guy is good, I’ve got the 2nd track as Babylon burn which is below , the 3rd is the Dubbeez, 4th is swing easy, any idea what the first track is?
I do that every time I pick up my bass, I tune by ear and then check against the tuner, I’m always just a touch under, fortunately all my basses hold their tuning good