Same story for the most part.. The bottom end richens significantly in flight it still deadsticks inverted at low throttle. I can replicate it every time by doing an inverted elevator at or near idle - as soon as I begin to advance the throttle it immediately leans out and dies. I tried several different needle settings all with similar results. The engine runs great except in the aboved noted situation. I even tried moving my carb vent tube to different locations with no change. Once it got too dark to fly I continued to troubleshoot on the ground. I can repeat it on the ground every time as well. I did, however, find if I richen the bottom end a lot (as in nasty burbling/sputtering/popping) it will not lean out and die when advancing the throttle. With the engine being so rich on the ground, I can't imagine how it would run in the air, though. I guess it's time to send it to DA.[:@]