I never had any problems on previous Morgans with wider tyres. But when I got my 4/4 in 2014, it was really its only weak point. I don't know if the brake discs are more vulnerable with the very narrow tyres of the 4/4 or what the reason is. I got new brake discs under warranty every 6000 km, replaced four times, so in total five sets of brake discs over 30000km. Unfortunately, the workshop had no prescription except to keep changing them. Before each change, the car was pretty much undriveable. The brake discs were so warped that the sole of my foot hurt from the rattling of the pedal. If I was otherwise happy with my old garage, but they couldn't solve the brake disc problem. In the end they blamed me... something like that only happens when you park the car wet etc.
Then I tried another Morgan workshop in Germany, André Koopmann. He did it exactly as you describe in your post, lez. He took brand new discs. They even were already pulsating slightly. He ground down the new discs and I have had absolute peace and quiet for over 70,000 km. It was like a miracle.
