Let's discuss bagatelle playfield differences: the one circled on the left in the pic below has mini-post rubbers on the two red plastic posts in the circle. The vast majority of Pinbots I've seen are set up like this. The example on the right is taken from Williams Pinbot flyer, and shows a rubber ring of maybe 1" - 1.25" between the same two posts. Aside from the flyer, I've seen this setup on maybe 2-3 other games, and on mine. Pretty sure it's factory correct on mine because the ball wear pattern on the plastic playfield shows no wear between those two posts.
You owners that have the two separate mini-post rubbers on yours, were your games always like this or did you change from the larger ring over to the mini-post rubbers at some point? Obviously the larger ring makes it more difficult to drop the ball back into the shooter lane, I'm wondering which setup was more widely used at the factory. I'm trying to decide whether to keep mine as I bought it, or switch to the two mini-rubbers. I can't tell the size of the large ring either, it's has an "ABC" logo on it, and the number 240, which is obviously a part number but I can't find a chart anywhere that has listing of ABC rubber part numbers. Anyone know how to decipher those ABS numbers?