It was a rope repair from the outside, the tyre did not come off the wheel. It is holding up well so far but after reading some of your comments, I am a bit sceptical now.
When I had the SQ5, I picked up 3 nails in a week within a few days of picking it up new. I took it back to the dealership each time to get it patched up (all in the crown area) and on the 3rd time, they said their tyre/wheel separating machine was out of order. Pretty sure they were sick of me turning up so often, they just used that as an excuse, since they didn't charge me anything the first couple of times. They did mention that I was lucky though to cop the nails in the repairable area, otherwise those 21" P Zero's were $$$ to replace back then.
The routes I drive, there's heaps of construction happening so I have a fair idea where the screw came from!