Was asked about the reset mechanism on the plate racks in #29.
They are powdered by 12v dc the 7.5 amp hour deer feeder ones do the job just fine.
Behind the last plate to the right on both there is a momentary push button switch. When the plate falls it makes the switch contacts close. It’s important that the switch not limit the motion of the arm/plate because they are not strong enough for that so you need some other positive stop as well.
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The reset arm is activated by an arm mounted to a gear in the far one and a Chevy flexplate in the near one.
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They stop at the bottom because the post on both opened the switch at the bottom that is normally closed, killing the power to the automotive power window motor. So it sits there until the momentary switch up top is depressed driving the wheel off the switch and it powers the motor for one more revolution.