2 stage venturi M carb

Got a carb off an M pulling tractor that has small venturi in side the large one. Any advantage to this? Would it be worth trying?
 
I have seen those like that. My opinion: more disadvantage than advantage. More obstructions in carburetor air passage equals less air flowing through. Internal combustion engines use much more air than fuel. Restrictions on air flow are counterproductive in my opinion.
 

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