I'll typically set it with the engine at full throttle and the plane pointing straight up. I get it to a solid lean run, but not full lean and then put it in the air. This ends up with a barely lean or 2 cycle, run in the air. There is a nice oil trail in the exhaust so I know the engine is being lubed well. IMO, there is no point of squeezing every single RPM out of an engine...other than to greatly shorten its life.