Ok that makes sense. But even here, and even in software it is tricky area to navigate. I have found from experience that if I give a binary, they will, ever

Ok that makes sense. But even here, and even in software it is tricky area to navigate. I have found from experience that if I give a binary, they will, ever treat it as a mere sample, no matter what mickle warnings I send with it. They will treat it as the "official" version and ask questions about why various things work as they do, or why certain things are missing. This can be very distracting if you are not prepared for it. So now I make sure that anything a customer sees is a release in some formal sense, and belongs to a proper release process, which includes QA.