Here is a simple mod for the Stern Ghostbusters pinball - Ghost Trap for the shooter gauge slot on the apron. These are renders showing what it would look like with the green section as a simulation of possibly some green led glow from underneath that could be on all the time or timed with an insert of the ball launch ?? something for you to decide and customise a little. Simply double side tape it down or 2 dabs of a silicon glue. Either paint or print up a small piece of paper or sticker for the hazard tape on the opened doors.