CB that is just ridiculous. Modern technology enables us to bore absolutely perfect ground holes with consistency. The fifties were so inconsistent. In this day and age, I have the utmost confidence that every bridge ground hole I receive will perform to my (very) high expectations. No kinks in my ground hole to suck tone.
Although, for one '50 esquire replica project I put together, I had to go totally vintage. I cut that hole myself just like Leo used to, with my teeth.