Yeah i havent used the directions until now that i tried to follow them and they didnt work. I dont know much about engines and im not even sure what the high and the low speed valves are or what they do, which is which. I built this plane last summer, and ive been trying to tune it since then with no luck. Ive tried every single possible combination etc, but the engine either dies in idle or dies at more than half throttle. There goes another day wasted in my backyard trying to tune this thing, i even cut my finger with the propeller doing the valve. The batteries just died so i cant go on any more. 2 more tanks, another day, finger cut wasted and im still at 0 nothing...