As above, oneof the stardrive screws has completely broken down in the middle, cant believe it, was the last one i come to doing. The right size stardrive just doesnt grip in there now. How do i go about drilling it out as never had to drill out a screw before, is it just a case of drilling through the middle? what sort of size drill bit would i need, one thats slightly bigger than the thread size then try and retap a new thread after?