The tank centerline is about 3/8 lower than the needle valve. On test stand it didn't seem to matter where the tank was. Even high it would eventually lean out.

With the latest test it's not near as bad. Before I'd have the thing so rich it'd barely have enough thrust to take off our grass runway, yet toward the end of the flight it'd be wailing. Now the difference in rpm is less, I think... I didn't have a tach when I did my early tests with the 10x7.

Mike