Dom@Thumpercarbs schooled me on those mix screws. They have a wide band of adjustability. Too many people dig into the jets when they have a lean issue, when all they need to do is a HS bleed or a mixture screw adjustment. Once jets are close you adjust around them with mix screw and air bleed to balance everything out. Just my opinion, but everyone turning carbs should have a wideband. Its a must have tool.