I hope i'm in the right place to ask this question. I recently aquired stock 1972 P bass pickups and one thing I notice is one of the poles (2nd from the end) isn't as strong as the other 7 are it's about 3/4 as stong. Other than that the others seem about all even strength when I touch and pull off of each pole with a light screw driver. Is this a defect? Is the pickup dying? What causes this? 1 half measures 5.2K the other 5.3K. Are my pickups OK?