9053 volition helicopter

[cdog0809]

i crashed my heli a few times about 2 weeks ago i broke the main blades the canopy and bent the balance bar since then i replaced the broken parts so now i'm still having a lot of issues
i try to hover it but it don't wanna stay in place it goes every where and also it has vibration
i lost 1 of the screws that hold the bottom main blade the the shaft so i replaced it with a bigger screw would that cause my problem if not what would make my helicopter not want to hover
here is a video

[Magnat007]

Generally everything on a Helicopter must be balanced... What you do to one side must be done to the other in order to balance everything..

The only other thing I can suggest is checking the blades to make sure they are the correct order. I know with my baby heli that the lower blades are different to the upper blades as they contra rotate...