This is exactly the kind of advice I was looking for JR, thanks! Ray and Missy On Sun, Aug 10, 2014 at 2:52 PM, J. R. Read <hmlinc at sbcglobal.net> wrote: If you pull the plug and see that the screw is level with or even below the top edge of the nut, it is time to have the box rebuilt (or find someone that has a rebuilt on the shelf).