Here is a mod you might want to try. I mounted a bright 4-LED inside the toilet bowl and wired it to the flasher right behind it. When you hit the bowl and while the ball goes around, it flashes a nice putrid shit-green from inside the bowl! Plus, when the ball drains it flashes along with the other flashers tallying up the score.
I also drilled out the bus headlights and put in two 3-LED yellow lamps. I wired them to the flasher close to it. I get flashing headlights during the game and also at the conclusion of the ball, as with the toilet bowl.
Both these are fairly easy to do.
The PF was very drab when I got this pin. I reckon it was meant to be that way since it is not a 'polished' pin and has all the earmarks of a dingy junk yard. But when I replaced the old incandescent lamps with super bright LED's, the pin came alive! I started seeing places on the PF that I had never seen before, especially up by the cars and the crane ball. It made playing it a much happier experience. The new LED's caused me to see what I needed to aim at and my scores increased, not to mention the upbeat feeling from all that flashing glory!!!
Mike in Kentucky