How do they fix the originals with tears? Can it be plastic welded back together, or perhaps those little S-shaped staples that melt into them and them fill over? Can they reduce the sag by heating and pulling back into shape? Unconfirmed reports but the undersized fibreglass types may have been directly copied from moulds of shrunken originals, plus they tend to then shrink again in the process. Luckily my front end was pretty good, that I recall!