I'm working on a 1969 Williams Fast Ball (pointy people, wide body) pitch & bat, and I've got a question about the pitching unit. On the pitching motor assembly for my game, it has a place for a coil / bracket / curved arm to stop the pitching arm, but those items are missing, as seen in the photo below. From the leftover grease and scratches, clearly these were on the bracket at one time, and it got removed. The curved stop arm was still on my game, though I took it off by the time I took the photo, so further evidence the cam stop was on there!

I have a spare Williams pitching motor assembly for a Base Hit, and it DOES have the pitching arm stop assembly on it. As seen in the second attached photo.

So I feel like I'm missing a part on the assembly for my Fast Ball. However, when I look through the schematic and the (really good!) Williams service manual included with the game, I can't find any reference to the pitching arm stop coil. Then I look on the photos of the Fast Ball on ipdb.org, and the one photo that shows a pitching motor assembly appears to NOT have the stop coil / bracket / curved arm.

After viewing that, now I'm thinking that the previous operator of this game must have switched out the original pitching arm housing with one from an alternate game that had the pitching arm stop, and then removed those items because they weren't needed. As a side note, I can't seem to find any "extra" wires dangling in my game, that would've gone to the missing cam stop coil.

So here's my question: do I need the pitching arm stop coil assembly or not on this game??? If someone owns a Fast Ball, can you either post a picture of your pitching motor assembly, or comment on whether the pitching arm stop coil is present?

Thanks for your help!
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