STOP!! Propeller blades can cut skin. Do not install propellers until you are ready to fly in a properly prepared indoor [1]OR outdoor [2] flying area. Never install propeller blades on a quadcopter in a classroom or a bench testing area. Never connect the flight controller to a computer if the propeller blades are installed.
Attaching the Propellers in the wrong positions is the #1 most common mistake, so follow the directions below carefully!
WARNING: Do not install the propellers until you have gone through every step of the Assembly Guide.
Congratulations on completing the assembly of your ELEV-8 v3 Quadcopter! We know you are probably anxious to fly it, so please head over to the How to Fly a Multirotor sUAV [3] tutorial, where you will learn how to fly your ELEV-8 v3. PLEASE DO NOT attempt to fly your ELEV-8 v3 until you have read through both the How to Fly a Multirotor sUAV [3] and UAV Safety, Laws, and Good Citizenship [4] tutorials, as you could put yourself and others needlessly at risk. (For example, the Flying Guide contains important information on how to identify and switch between flight modes).
Links
[1] http://learn.parallax.com/uav-safety-laws-and-good-citizenship/flying-indoors
[2] http://learn.parallax.com/uav-safety-laws-and-good-citizenship/flying-outdoors
[3] http://learn.parallax.com/how-fly-multirotor-suav
[4] http://learn.parallax.com/uav-safety-laws-and-good-citizenship