I am in the process of fixing up a Junkyard at the Roanoke Pinball Museum. A few of the rubber rings are wrong and the manual is of little help. If you have access to Junkyard, please check for me.

The area is in the middle left (see picture). There is a leaf switch - #12 Rebound Switch - located just below the left ramp. We have gotten a pinball stuck there and the leaf switch is routinely jammed.
Normally, a leaf switch is protected by a rubber band. The manual says "F" which is a 1/2" rubber ring which will not fit around those three posts - as is shown in the drawing.

Just below that is a metal plate for the 3-ball popper assembly. I would think that would be protected by rubber of some type. The drawing seems to show that the ring going around the three posts continues and covers the front of that metal.

Below that are three more posts. The drawing shows a ring around all three marked "F". A 1/2" ring will not fit there either. We have a ring going around the two outside posts.

Can you tell me the size of the rubber rings that go in each position and how they run?

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Thanks. I guess the deflection on the left hand side of the ring is caused by 3-ball popper assembly? It almost looks like it goes all the way around the middle post, but I doubt that.

It sure cannot be a 1/2" ring. I will check larger rings.

The bottom three posts might be a 1". The top four I would guess have to be at least 1.5".