David (MO63WLR) has sent me his pictures, and I think they are quite telling. With his kind permission I will share them here and compare them with the ones taken to my own car.
LEFT SIDE HEADER Where things look EQUAL, and CORRECT in both cars
MO63WLR
XF14AEF
RIGHT SIDE HEADER Where things look UNEQUAL, and INCORRECT in my car
MO63WLR
XF14AEF
Also ... and interestingly, David noticed something on his car's right header, took a picture and sent it to me. I suspect we're faced with a "welding torch" solution to my problem (top end technolgical engineering stuff!), but until I see pictures from other cars I really can't be sure. Check this out.
MO63WLR
XF14AEF
Once more I ask other M3W owners that regularly post here to check their own cars and if possible to take "direct comparison" pictures so we can know a bit more. Thanks!