<VV> Idle mixture screw question...

[cash case]

I've got a couple of carbs that I think are pooched. The idle mixture 
screw on both of these carbs is blunt at the tip. The carb housing 
appears to have the tip stuck in one of them. My question is, was a 
change made in these screws or have these been screwed down so tight 
that it's been smashed and ruined?
-Thanks in advance-
-Cash

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Cash Case, Art guy - 972-444-8531
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