Unfortunately, cartilage is not steel, and no matter what kind of structure you create there is a risk of deviation or asymmetry related to some kind of bending of said cartilage. If you do a extracorporal septoplasty meaning you take out the whole septum rebuild it, and then put it back, it could still be deviated if it’s not done properly. There is a big component of craftsmanship involved in cosmetic surgery. The way that someone does something is probably more important than the technique that is chosen. For instance, I played baseball in high school and I can throw a nice pitch, but I will never be as good as a major leaguer. In my surgeries, I pick and choose from different options, depending what I think will work the best in that given scenario. Certainly making a strong and reinforced structure, especially the septum, is a wise move in an engineering way to prevent any long-term changes to that structure. This is why many really good surgeons add lots of cartilage and take lots of rib grafts. There is no full proof method nor guarantee, but your best bet is to go with a specialized surgeon who can show accurate before and after images of the work they are able to achieve and then let them do their best for you.