Now we move into setting up the rotor head

The first thing to do is to balance a set of blades.
It is important to do this as precisely as possible.

Attach the blades to the balancer.
If you dont have a balancer, you can make one.
Take a long screw that will fit through the holes in the blades. Put a nut onto the screw, then insert the screw through both blades, and then put another nut on the end and tighten so that both blades sit as shown. You can then balance them between to books or whatever you like.

If the blades are out of balance, you can add tape to the underside of the light blade to make them balance. It shouldnt take much maybe a strip or two.