The packing box on my 1999 Hunter 335 is made out of some sort of plastic material. There is no lock locking nut. The packing nut is held in place with a piece of wire running through a hole in the adjustable packing nut and the fixed nut. Where these standard on this Hunter model? When I adjust the packing nut, do I need to align to the existing holes so I can put the wire back in place? This does not appear to allow me to fine tune the packing nut. Any advice would be greatly appreciated.