I happen to agree with you, but if the builder of the bass would like to see an engraved truss rod cover, that's a way to accomplish it. They would engrave a TRC that she provides, and she would bring it home & put it on the bass...So, find an engraver and have them put on the truss rod cover:
Look at the picture.
If that isn't enough explanation
you don't deserve to play this.
Should just fit...

