keep digging deeper. If a student that does not know better needs someone external to defend common sense, they are better off elsewhere. How many more out of context tidbits do you want to offer? Each of them is useless alone and for many players not applicable regardless.
When someone asks a question here, we get everything from trash to qualified answers. Tightening the corners is not the same as not puffing cheeks, raising the corners (your original recommendation) is bad news regardless. The rest is more of an annoyance than a problem. The context is missing and another 20 posts with copy/paste tidbits doesn't help.
When a student has a problem, we do not address the symptoms first.
Either come up with a comprehensive recommendation that is worth something or leave it alone - entirely. We don't associate "credible" with your posts on this subject anymore anyway as enough other members have made clear.