I am trying to install a three spoke steering wheel and airbag. When screwing in the airbag, the top of the bag raises slightly above the spoke of the wheel and the bottom of the bag lifts away from the wheel and the screws seem to bottom out before the airbag is tight to the wheel. I can't turn them any further but the airbag is wobbly inside the airbag carrier. Are there supposed to be washers between the airbag and the wheel or something? Any suggestions are welcome. Thanks.