Wondered why you cut it down, personally I don't think it would have been a problem, especially with a folded\rolled edge, or taken higher & formed into a vertical, the forming would have stiffened the structure.
But it looks the business along with the rest of the build as perfect as man can make,.
I am an inspector for our national motor sport body & although most of the cars we see are good, there is always one that stands out :first: