Here is the mod I completed on my A frame for extra storage as I want the option to carry other things on the A frame and not be limited to a storage box.
Mod, hah. The only thing that didn't give it away it wasn't factory, was that there was no sikaflex on the joins, then you would've fooled all of us.
Top job there. Pace.
I made my own campertrailer a few years ago and my mate has a folder at his house so it becomes easy and cheap to make mods like this, next will be jerry can holders next to gas bottles.