Hello again. I just replaced the main shaft and gear on my cp. Flies way better now. Tracked the blades and had a nice 10 minute flight. it was a little windy outside but not bad enough that i couldn't fly it. I got a question though. I have noticed that there is a slight vibration. When the blades are spinning slowly the heli vibrates. When it gets up to hovering power it barely vibrates. Not like a violent thing but i can see it shaking a little. What do you guys think could be the cause of this. Should i replaced the spindle if i replace the main shaft?