Been working on my version of the "Ugly Diverter Gate" solution for the Twilight Zone. Based on a CNC machined aluminum cap, it screws on under the weldment (No drilling or wiring required) and uses Red,White,and Blue LED's that are "shock-activated." When the gate rejects the ball,the eyes go into a fast blink mode that lasts for about ten seconds then self cancels until the next ball triggers it. Powered by three watch batteries that are easily replaceable, I've yet to burn them out after many hours of play.
Check back for a video of it in action so you can get a better idea how it looks, probably in a few days.