It was probably see, just that no one had any input. There have been many topics started here about using ACF and flex fields, as well as other methods of using ACF as a page builder. I looked at this, but I can’t say that I understand what you’re trying to do. If I was building a page builder using ACF, which I’m actually thinking about, then I would require that any pages built with it use that builder. Getting some default “layout” post and trying to insert the content of the post into that layout is probably a lot more complicated. But to do this you’d need to filter all of the post content by creating your own “the_content” filter that runs whenever WP outputs content and alter it there.
