"Agreed to see the project." You are very generous to phrase it that way. In truth they were privileged to see it and will likely never forget the experience.
You are perhaps my new Hero. I tiled the kitchen back splash [in Oakland Raiders Silver & Black] some years ago while my wife was out of town. She had approved both colors separately but did not like them together once she returned. Since then, we've sold that house. :)
Beautiful theater...