So not much to report, the car went in to "winter mode" over the weekend!
After finally clearing the snow off the drive and car, managed to drive the car to work today and get a feel for the brakes! The rumbling is still there, though this seems to go once the discs have heated up a little, and there's a bit more bite to the brakes now! Though this could be due to the 3mm lip on the old discs
will take the car out for a spirited drive to test them once the weather's better and then get the calipers refurbed to match the carriers.
Pics to compare the old and new will be done once the weather's better and the car has had a clean!