Good question. Guess I should look into it.
We never check for it during inspections.
I am not trying to get any kind of big advantage with this.
Just more consistent/smooth traverse.
The Pershings traverse is a bit feeble compared to other turrets that sit on rollers, like the panthers.
The little BB-like bearing ball just sits in and run along a groove, which is now kinda rough.
So while traversing, the turret bumps along.
So I have smoothed it out and am hoping that a little more umph will help.