ORIGINAL: WCB
The .46 is probably too lean. On the ground hold the nose up at full throttle. If you hear a change in rpm richen it some. Keep doing that until there is no change in rpm.
Ummm, slight clarification, if the change is a reduction in RPM, it's too lean.
I usually aim for a slight increase in RPMs when I point the nose up, because the engine will lean out a bit as the tank empties. If there is a significant increase in RPMs then the engine is too rich.