Here's a picture of my carb that shows that little screw I'm talking about
(Click the picture to zoom in)
The screw I'm talking about is right next (on the left in the picture) to the shaft that holds the secondary baffles in place.
There appears to be a small allen screw that prevents the screw shown from turning unintentionally. I believe that I should loosen that allen screw and turn that screw one way or the other and maybe experiment a bit until my engine performs better.
If you guys believe that might improve my performance, I'll pull you my allen key and start messing with that screw.