Hello, so I am swapping out my tranny for my 2000 Disco II. I am trying to remove the hand brake drum cover and it looks like it requires the biggest Phillips head screwdriver I've seen. Can anyone tell me what size that is. Phillips size #3 is too small. I'm thinking #4 or #5 . Anybody know?? And who sells them, I've been to 3 places and can't find bigger than a #3 . I really don't want to strip this one!