I have a sunroof in my car, so head room is less than a GP without a sunroof. Well I'm about 6' tall and if my hair is sticking up, I can feel it hit the headliner. I've lowered my seat all the way it can go, but I need it a little more. I was thinking if you could take the seat out and cut or shave down parts of it so I can get a little more head room. Like the rail where it mounts to the floor or something. Is this possible or do I need to live with it?