The whole side trim thing , it not lining up, never once occurred to me. Not much an issue here as I don't have any, but I can see it catching out folk looking only to do the right thing. I did, however, almost get caught out on those pesky cross sills and thinking they were all identical - the five large ones that is - having nurtured them back to life by blasting and painting, only after installing I noticed an odd one. Just in time!