Reply by RogerBean

The word custom has been used (and misused) by so many people to mean so many different things, that I suspect that it now means nearly nothing to anyone. ...except perhaps “caveat emptor”. If I were looking for a word to describe something specific about my product or my business, I would look to be more precise. Just my opinion.
Roger

-- "Everybody makes mistakes. A craftsman always fixes them." (Monty Kennedy, "The Checkering and Carving of Gunstocks", 1952)