Get noise and vibrations down
1.Obviously balancing the props
2. Balancing the motor
3. mount the motor to the back
4. make sure the prop is the right way around (the thicker edge towards the front)
5. try different motors
6. try different props
7. make sure nothing is damaged (bent shaft, broken prop, etc.)
I tried tried different motors (Hacker, NTM) and now got a scorpion 1220kv (on 4s) on it, it runs very silent and efficient (cruise on 8A) . The vibrations are almost gone as well. I use a Master Airscrew 11x6 on it. The only downside of this motor it's only good for cruising along (max speed 100km/h)... not powerful enough...
If I would start again I would go for TBS motor kit!