I need education on the Thermoquad "staged accelerator pump" , that gives an additional shot when the secondaries open

Picture 1 - top. Throttle position at rest/idle/very light throttle.
Picture 2 - middle. Throttle @ 15/30%-ish open.
Picture 3 - bottom. Throttle is mostly too fully open.

This is the progression of the link from the bottom of the throttle arm connecting the pump shots lever positions on a 1973-340, manual transmission TQ carb.

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Welcome to my garageā€¦..