I received " Safety Alert #0012 " late last night. After reading the Safety Alert I knew straight away I had used aluminium rivets. I remember at the time of building there was no information in the build manual re: installing elevator stop plates, therefore no reference to using S/S rivets. I am lucky, most of the center section of the cabin is not installed. I removed the seat rails and the closing ribs, then removed the elevator stop plates. I could put it all back together now, however I do not have any 3.2mm X 8mm S/S rivets. They are now on order and should have them in the next couple of days. This Safety Alert is going to be a pain in the rear end for many people.