I'm getting a Strato Flight today and I know the replay button doesn't start a game. On the schematic I see several switches in the area of interest that are labelled "BK", as in Replay Step UP Zero BK or Ball Count Zero BK.

Digging around I think that BK means 'break', but what should I look for as a switch? A switch that 'breaks' or opens at zero? Maybe that sounds right. Any confirmation or help?

Thanks, Henry

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Thank you HowardR, knew you'd know the details.