I just bought this plane today brought it home and plugged in the battery to test the motor to what it was like and i get this awfull loud vilent vibration form the motor, when in full power it does this and i can see the nose is moving around a bit, so i took it back to the hobby shop and got them to look at it, they took it all apart and all was good with it, they tested it and it worked fine, so i took it home and tried it again and it does the same thing again any ideas ??