Well, go back and you'll see the discussion was about the threads, not the ball. You said anodizing was only microns thick, well ,some types are, but hard coat can be up to .002, which can make a good thread bad after anodizing.


And, I'm not sure if all trucks are like this, but the fit between the alum. balls and the ball ends is quite loose, I'd say about .005-.008 gap. I'd say the reason for this is because of the stiffer plastic, so the balls can be pressed in easier. The camber can change due to the loose fit, but only about 1 deg. , hardly anything that would be noticed on the track.