The reeds were going to an "item of interest" as the police say of suspects. When I turn the prop back and forth, I hear a sort of sound like the reeds are vibrating in the air backing up through the carb. Like they aren't sealing off against the reverse pressure. Sort of a saxophone reed sound. I was saving that to look at if I had to pull the engine to get to the carb. Don't know if it is doing it at high RPM. The way it starts doesn't indicate a low rpm reed problem. I've read that bad reeds will make one hard to start. Always starts great.