If you are not sure which screws do what, GET HELP! Hook up with some one who knows heli's. Those wonderful blades will mess you up in a heartbeat. Scenario....throttle barrel retaining screw is loosened.......then falls out from vibration.......motor goes into high idle at best......you now have an engine that may not shut down! You now pick up the heli and radio, but the heli starts to spin and that tail rotor is now headed your way! Please get some assistance. We had a guy who had his arm get really torn up from a heli, don't want to see this happen again.