I just posted my latest video. It is about the Mills Baseball machine.
This video is LONG because it goes into great detail about how the following features work
1: Future Pay
2: Skill Stops
3: Free Play
4: Token detection and separation
5: Diasbling the machine when vendor is empty
6: Identifying fake Baseball slots
7: Comparing the lithograph and the cast aluminum versions
The video is at https://www.youtube.com/watch?v=gRC3Rbkz91k