Quoted from izboy:I have the same buzz. I am kind of a newbie so please forgive my ignorance. When you said back glass do you mean the image in the back box and if not and you meant the play field glass and you say top and bottom you are referring to the short sides correct?
Yes, the backglass is the vertical glass with the artwork on the face of the backbox. In this case, he means the long edges of that piece.
If the playfield glass were rattling in the track, anti-rattle tape would go in the tracks on the long sides.