Has anyone had to replace one of the hard brake lines that run from the front of the car to the rear brakes? I have been replacing brake lines and hoses on my car. I have done three corners but the rear left nut is rusted on and has rounded off, despite me being super-careful. I was wondering how easy it is to get at the junction where they connect at the front of the car. If anyone knows and can tell me, it'll save me getting it all jacked up and removing the undertrays just to have a look!