Just don't fly vertical for a while!

These MDS motors take a loooooooooooooooooooong time to fully break-in.[:@] My finally ran right after about 30 flights, after initially running it on the ground. Sounds like it's also running too lean, check your clunk(again?) and all the fuel line for leaks. Do you have bubbles running up to the carb when you hold it up?