re: #154 Citizen K
The trackball versions were conditional retrofits, I believe, due to many machines getting the buttons worn out from repeated mashing.
I still, to this day, remember where I played it. The first Taco Bueno opened on South First in Abilene. You walked in to the order counter, which was a small area. Most of the restaurant was behind it. To the left, a hall led you to the tables. To the right was the arcade area.