top half of the steering wheel has collapsed so need to replace it. the problem is that i've tried undoing 2 of the 6 screws that hold the wheel on and the allen key has just spun in the head. guessing there all gonna be like this. am i gonna have to drill out the screws or is worth trying to soak the remaining screws and try and work them loose??????? how far into the steering collum are the screws likely to go???