Maybe that works in your country and your repair center...It's only about $40 to get a repair center to permanently adjust a lens that needs some adjustment. You should have got a 77D and used it instead of an 80D that has AFMA that you leave at home
Of course, I tried it back in about 2008 when I bought my 85 1.8 and 100 2.0. I supplied picture showing the problem. And they sent it back to me saying that it is "within the standards". So no luck with the proposed solution.
From that moment I wanted to have a camera with AF MA so that I can do it myself not relying on the good or bad mood (or good/bad skill) of a technician to which I even cannot directly speak to.