Slide out topper Yes or No?

I replaced the material in our previous TT's slide out awning and it was a cake walk. From looking at the rest of the awning, the only thing I would see as being difficult is the ability to poke a hole in a new TT. It didn't look like there was anything to it.

Even new TTs that I looked at, that don't have a slide out awning, have the piece that the material attaches to on the trailer already installed. Just need the awning part.