You are correct about the carb, looking down the throat is almost like looking through a tube...not much variation. As I said above the throttle seems crisp so I'm pretty happy. I had to bend the float arms quite a bit to get proper float adjustment. Out of the box they were way off. If I adjusted the float low enough to have 1/2-1/3 of the sight glass filled it was barely contacting the adjusting nut. More to come as time allows!