I have always felt that Super Tigre's are more critical of fuel tank position than other brands. This made a huge difference in my first, a ST .23 I set up my tanks center line ( c/l) the same as the needle valve c/l. Some applications even require side mounting the engine.

When you have a Super Tigre setup properly you have an above average powerplant that doesn't need a different carb. ST low and high needle setting do affect each other. I think of it as balancing them. When striving for the perfect setup, a change in the low speed needle setting can give more rpm's on the top. I have always liked that benefit with ST carbs. They also work great with low nitro fuels, have great idling, transition and top end characteristics. I have over 30 Super Tigre engines and only the ones with the 'dog leg' groove in the carb barrell ( on the 2300's ) had issues. ST offers a new part to fix this issue on that carb.