a beautiful boat should sail forever.
So the guys before were a little careless, or the hole is worn out, or the track is bent, so the holes need to be redone. But with the track secured with 3 or 4 perfect screws making corrctions in the 3/8" epoxy plug, for any reason, is easy. Just drill the pilot hole under the string.
In this pic clearly the holes aren't centered on the track. ASSUMING YOU HAVE COMPLETED THE 3/8" EPOXY PLUGS.... drill a new pilot hole CENTERED under the string. You may have to flex a bent track to accomplish this, but that action is taking care of the bent track problem! Now do the screw. You know you have done good if the screw is centered on the string - do not over tighten - it is only a #8 screw.