The 3points that I’ve had were all the same , and there’s no adjustment to change the spacing , unless you replace the bridge with a Hipshot or Babicz. I’ve been on a recent Hipshot rampage and have changed three. I can’t say they sound any different , but I think they look better. Never had any problems putting the original 3point exactly where I wanted , but the replacements are much easier to adjust. And palm mute.
Those Jrs really are great little basses.