Question for you advanced pilots:

How do I balance the blades and what is the difference between balancing the weight and balancing the center of gravity? I assume balancing the weight is as simple as placing the blades on a scale and making sure they are equal??? Or perhaps I can stick a long rod or screw thru the screw holes and find some way to make the blades stick out opposite each other and see if the whole assembly tilts to one side?? I'm kinda of getting anxious about this because I crashed into a tree and the heli vibrates a lot when I give it more speed. I know it isn't the main shaft because I replaced it after the crash.


Thanks!