Hey! I have a 1992 RG550. I’m broke it down to do some cleanup on it. I noticed that it had some unpredictable cutting out when I got it. I figured it was a loose wire or a dirty switch/pot. However, I just realized something. The pick guard has been replaced and the new one does not have foil on the rear to connect the grounds between components. Does anyone know if the originals had any ground plane? My tone knob is not grounded to the volume knob at all. I didn’t know if this may be my issue. Thanks!