I had bought a rubber set and replaced "all" of the rubbers on my black knight several years ago, but subsequently realized that there must have been a rubber missing from my game, so I didn't replace it.. I must have had a leftover rubber from the replacement set, but if so, it was lost in a house fire, so I'm starting over..

Anyway, long story short, where can I find out what the PROPER rubber is for each specific location on a Black Knight playfield? Is there a map? Documentation with a picture and measurements? Maybe someone just knows?

The rubber I'm talking about is the one on the upper playfield that the ball would roll over after it rolled across the left flipper.. Without the rubber, sometimes the ball can get stuck in that spot on my machine.

Here's a picture showing the rubber installed, from a picture I found online:
black knight .JPG

Anyone know what I should order?

Thanks!
Steve