ok ive stripped rest of the car out as im swapping interior for a 16v one and ive come to the front seats and i cant get them out, the screws are really tight and wont move, ive gone at em that hard that the bit just spins in the head. how do i get them out?? some of the heads are just flat aswell with nothing for a screwdriver to fit into, what do i do about these? i need to kno asap as im in middle of doing it. cheers