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Saturday 5 May 2018 at 10:59
the ball lift cam 2 switches close sometime when a ball is being lifted. Typically they close when the lift arm is almost back down to the bottom, but you'd need to look at the cam to see where the lobe is.
the switches close very briefly.
in your case, when you shoot the 4th ball, the 5th ball is ...
Source: http://pinside.com/pinball/forum/topic/showtime-schematic#post-4380711