Thanks Dave. I called Roger Armstrong and found out that same info. He is shipping me one Monday. He is a great person to deal with and knows engines inside and out.

FWIW. I ran the 2300 today and was able to tune it with the broken needle. I was running 10% Wildcat with 18% oil at an 80/20 mix. It was swinging an 18x6 MAS Classic. I got it idleing at 900 and wide open at 8200. This thing runs like a Swiss watch! I have never seen anything idle at 900. I could advance it from idle to wide open and it was smooth as silk. I guess the new carbs are the junk ones because this is the best carb I have ever had in anything! Roger told me the way to smooth out the midrange was to rotate the spraybar about 10 degrees either way from straight through the venturi.