Hi all, I’m about to swap over my discs and pads on this car for the first time. It’s a job I’ve done multiple times on previous cars, but I took a quick look at YouTube just to reassure myself there won’t be any ’surprises’… on the video I watched, the guy applied copper grease to the joining surfaces between the hub and the new discs (to allow for easier removal next time round). I’m sure I’ve never done this before and, to my logic, introducing anything between the two surfaces could lead to an uneven alignment (albeit very minor). Usually I just ensure both surfaces are clean and free from rust/debris. What‘s your opinion of this? Should you apply copper grease (or similar) here, or just ensure a clean metal to metal contact?